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Finding the Fourth Proportional to 72,330.60, 108,386.55 and 61,176.90

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Solution

The fourth proportional to 72,330.60, 108,386.55 and 61,176.90 is: 91,672.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,330.60 : 108,386.55 = 61,176.90 : x
  2. Step 2: Convert to fraction form
    72,330.60/108,386.55 = 61,176.90/x
  3. Step 3: Cross multiply
    72,330.60x = 108,386.55 × 61,176.90
  4. Step 4: Simplify right side
    72,330.60x = 6,630,753,130.70
  5. Step 5: Solve for x
    x = 6,630,753,130.70/72,330.60
  6. Step 6: Final answer
    x = 91,672.86

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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.