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Finding the Fourth Proportional to 71,130.78, 98,156.88 and 39,293.52

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Solution

The fourth proportional to 71,130.78, 98,156.88 and 39,293.52 is: 54,223.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,130.78 : 98,156.88 = 39,293.52 : x
  2. Step 2: Convert to fraction form
    71,130.78/98,156.88 = 39,293.52/x
  3. Step 3: Cross multiply
    71,130.78x = 98,156.88 × 39,293.52
  4. Step 4: Simplify right side
    71,130.78x = 3,856,929,327.42
  5. Step 5: Solve for x
    x = 3,856,929,327.42/71,130.78
  6. Step 6: Final answer
    x = 54,223.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.