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Finding the Fourth Proportional to 66,562.70, 99,734.70 and 56,721.20

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Solution

The fourth proportional to 66,562.70, 99,734.70 and 56,721.20 is: 84,988.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,562.70 : 99,734.70 = 56,721.20 : x
  2. Step 2: Convert to fraction form
    66,562.70/99,734.70 = 56,721.20/x
  3. Step 3: Cross multiply
    66,562.70x = 99,734.70 × 56,721.20
  4. Step 4: Simplify right side
    66,562.70x = 5,657,071,865.64
  5. Step 5: Solve for x
    x = 5,657,071,865.64/66,562.70
  6. Step 6: Final answer
    x = 84,988.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.