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Finding the Fourth Proportional to 93,987.59, 140,644.57 and 81,380.85

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Solution

The fourth proportional to 93,987.59, 140,644.57 and 81,380.85 is: 121,779.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,987.59 : 140,644.57 = 81,380.85 : x
  2. Step 2: Convert to fraction form
    93,987.59/140,644.57 = 81,380.85/x
  3. Step 3: Cross multiply
    93,987.59x = 140,644.57 × 81,380.85
  4. Step 4: Simplify right side
    93,987.59x = 11,445,774,524.00
  5. Step 5: Solve for x
    x = 11,445,774,524.00/93,987.59
  6. Step 6: Final answer
    x = 121,779.64

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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.