Home / 85,501.40-128,252.10-38,116.40

Finding the Fourth Proportional to 85,501.40, 128,252.10 and 38,116.40

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Solution

The fourth proportional to 85,501.40, 128,252.10 and 38,116.40 is: 57,174.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,501.40 : 128,252.10 = 38,116.40 : x
  2. Step 2: Convert to fraction form
    85,501.40/128,252.10 = 38,116.40/x
  3. Step 3: Cross multiply
    85,501.40x = 128,252.10 × 38,116.40
  4. Step 4: Simplify right side
    85,501.40x = 4,888,508,344.44
  5. Step 5: Solve for x
    x = 4,888,508,344.44/85,501.40
  6. Step 6: Final answer
    x = 57,174.60

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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.