Home / 85,427.40-128,141.10-41,140.65

Finding the Fourth Proportional to 85,427.40, 128,141.10 and 41,140.65

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Solution

The fourth proportional to 85,427.40, 128,141.10 and 41,140.65 is: 61,710.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,427.40 : 128,141.10 = 41,140.65 : x
  2. Step 2: Convert to fraction form
    85,427.40/128,141.10 = 41,140.65/x
  3. Step 3: Cross multiply
    85,427.40x = 128,141.10 × 41,140.65
  4. Step 4: Simplify right side
    85,427.40x = 5,271,808,145.72
  5. Step 5: Solve for x
    x = 5,271,808,145.72/85,427.40
  6. Step 6: Final answer
    x = 61,710.98

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.