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Finding the Fourth Proportional to 57,140.20, 85,710.30 and 15,020.20

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Solution

The fourth proportional to 57,140.20, 85,710.30 and 15,020.20 is: 22,530.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,140.20 : 85,710.30 = 15,020.20 : x
  2. Step 2: Convert to fraction form
    57,140.20/85,710.30 = 15,020.20/x
  3. Step 3: Cross multiply
    57,140.20x = 85,710.30 × 15,020.20
  4. Step 4: Simplify right side
    57,140.20x = 1,287,385,848.06
  5. Step 5: Solve for x
    x = 1,287,385,848.06/57,140.20
  6. Step 6: Final answer
    x = 22,530.30

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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.