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Finding the Fourth Proportional to 71,842.84, 99,108.78 and 55,817.62

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Solution

The fourth proportional to 71,842.84, 99,108.78 and 55,817.62 is: 77,001.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,842.84 : 99,108.78 = 55,817.62 : x
  2. Step 2: Convert to fraction form
    71,842.84/99,108.78 = 55,817.62/x
  3. Step 3: Cross multiply
    71,842.84x = 99,108.78 × 55,817.62
  4. Step 4: Simplify right side
    71,842.84x = 5,532,016,220.70
  5. Step 5: Solve for x
    x = 5,532,016,220.70/71,842.84
  6. Step 6: Final answer
    x = 77,001.64

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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.