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Finding the Fourth Proportional to 88,416.20, 132,624.30 and 78,739.40

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Solution

The fourth proportional to 88,416.20, 132,624.30 and 78,739.40 is: 118,109.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,416.20 : 132,624.30 = 78,739.40 : x
  2. Step 2: Convert to fraction form
    88,416.20/132,624.30 = 78,739.40/x
  3. Step 3: Cross multiply
    88,416.20x = 132,624.30 × 78,739.40
  4. Step 4: Simplify right side
    88,416.20x = 10,442,757,807.42
  5. Step 5: Solve for x
    x = 10,442,757,807.42/88,416.20
  6. Step 6: Final answer
    x = 118,109.10

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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.