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Finding the Fourth Proportional to 61,807.80, 92,711.70 and 55,246.80

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Solution

The fourth proportional to 61,807.80, 92,711.70 and 55,246.80 is: 82,870.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,807.80 : 92,711.70 = 55,246.80 : x
  2. Step 2: Convert to fraction form
    61,807.80/92,711.70 = 55,246.80/x
  3. Step 3: Cross multiply
    61,807.80x = 92,711.70 × 55,246.80
  4. Step 4: Simplify right side
    61,807.80x = 5,122,024,747.56
  5. Step 5: Solve for x
    x = 5,122,024,747.56/61,807.80
  6. Step 6: Final answer
    x = 82,870.20

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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.