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Finding the Fourth Proportional to 82,987.70, 124,355.48 and 60,815.77

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Solution

The fourth proportional to 82,987.70, 124,355.48 and 60,815.77 is: 91,131.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,987.70 : 124,355.48 = 60,815.77 : x
  2. Step 2: Convert to fraction form
    82,987.70/124,355.48 = 60,815.77/x
  3. Step 3: Cross multiply
    82,987.70x = 124,355.48 × 60,815.77
  4. Step 4: Simplify right side
    82,987.70x = 7,562,773,654.95
  5. Step 5: Solve for x
    x = 7,562,773,654.95/82,987.70
  6. Step 6: Final answer
    x = 91,131.27

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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.