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Finding the Fourth Proportional to 71,717.50, 98,967.52 and 39,888.45

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Solution

The fourth proportional to 71,717.50, 98,967.52 and 39,888.45 is: 55,044.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,717.50 : 98,967.52 = 39,888.45 : x
  2. Step 2: Convert to fraction form
    71,717.50/98,967.52 = 39,888.45/x
  3. Step 3: Cross multiply
    71,717.50x = 98,967.52 × 39,888.45
  4. Step 4: Simplify right side
    71,717.50x = 3,947,661,023.00
  5. Step 5: Solve for x
    x = 3,947,661,023.00/71,717.50
  6. Step 6: Final answer
    x = 55,044.60

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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.