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Finding the Fourth Proportional to 67,407.28, 93,000 and 39,102.64

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Solution

The fourth proportional to 67,407.28, 93,000 and 39,102.64 is: 53,948.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,407.28 : 93,000 = 39,102.64 : x
  2. Step 2: Convert to fraction form
    67,407.28/93,000 = 39,102.64/x
  3. Step 3: Cross multiply
    67,407.28x = 93,000 × 39,102.64
  4. Step 4: Simplify right side
    67,407.28x = 3,636,545,520
  5. Step 5: Solve for x
    x = 3,636,545,520/67,407.28
  6. Step 6: Final answer
    x = 53,948.85

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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.