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Finding the Fourth Proportional to 71,898.68, 99,220.88 and 39,634.50

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Solution

The fourth proportional to 71,898.68, 99,220.88 and 39,634.50 is: 54,696.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,898.68 : 99,220.88 = 39,634.50 : x
  2. Step 2: Convert to fraction form
    71,898.68/99,220.88 = 39,634.50/x
  3. Step 3: Cross multiply
    71,898.68x = 99,220.88 × 39,634.50
  4. Step 4: Simplify right side
    71,898.68x = 3,932,569,968.36
  5. Step 5: Solve for x
    x = 3,932,569,968.36/71,898.68
  6. Step 6: Final answer
    x = 54,696.00

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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.