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Finding the Fourth Proportional to 81,710.60, 122,565.90 and 52,040.30

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Solution

The fourth proportional to 81,710.60, 122,565.90 and 52,040.30 is: 78,060.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,710.60 : 122,565.90 = 52,040.30 : x
  2. Step 2: Convert to fraction form
    81,710.60/122,565.90 = 52,040.30/x
  3. Step 3: Cross multiply
    81,710.60x = 122,565.90 × 52,040.30
  4. Step 4: Simplify right side
    81,710.60x = 6,378,366,205.77
  5. Step 5: Solve for x
    x = 6,378,366,205.77/81,710.60
  6. Step 6: Final answer
    x = 78,060.45

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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.