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Finding the Fourth Proportional to 71,551.50, 98,736.12 and 39,717.89

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Solution

The fourth proportional to 71,551.50, 98,736.12 and 39,717.89 is: 54,807.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,551.50 : 98,736.12 = 39,717.89 : x
  2. Step 2: Convert to fraction form
    71,551.50/98,736.12 = 39,717.89/x
  3. Step 3: Cross multiply
    71,551.50x = 98,736.12 × 39,717.89
  4. Step 4: Simplify right side
    71,551.50x = 3,921,590,699.32
  5. Step 5: Solve for x
    x = 3,921,590,699.32/71,551.50
  6. Step 6: Final answer
    x = 54,807.95

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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.