Home / 85,549.20-128,237.40-38,835.60

Finding the Fourth Proportional to 85,549.20, 128,237.40 and 38,835.60

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Solution

The fourth proportional to 85,549.20, 128,237.40 and 38,835.60 is: 58,214.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,549.20 : 128,237.40 = 38,835.60 : x
  2. Step 2: Convert to fraction form
    85,549.20/128,237.40 = 38,835.60/x
  3. Step 3: Cross multiply
    85,549.20x = 128,237.40 × 38,835.60
  4. Step 4: Simplify right side
    85,549.20x = 4,980,176,371.44
  5. Step 5: Solve for x
    x = 4,980,176,371.44/85,549.20
  6. Step 6: Final answer
    x = 58,214.18

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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.