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Finding the Fourth Proportional to 71,871.66, 99,219.06 and 55,702.98

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Solution

The fourth proportional to 71,871.66, 99,219.06 and 55,702.98 is: 76,898.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,871.66 : 99,219.06 = 55,702.98 : x
  2. Step 2: Convert to fraction form
    71,871.66/99,219.06 = 55,702.98/x
  3. Step 3: Cross multiply
    71,871.66x = 99,219.06 × 55,702.98
  4. Step 4: Simplify right side
    71,871.66x = 5,526,797,314.80
  5. Step 5: Solve for x
    x = 5,526,797,314.80/71,871.66
  6. Step 6: Final answer
    x = 76,898.14

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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.