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Finding the Fourth Proportional to 72,374.40, 108,691.20 and 70,041.60

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Solution

The fourth proportional to 72,374.40, 108,691.20 and 70,041.60 is: 105,187.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,374.40 : 108,691.20 = 70,041.60 : x
  2. Step 2: Convert to fraction form
    72,374.40/108,691.20 = 70,041.60/x
  3. Step 3: Cross multiply
    72,374.40x = 108,691.20 × 70,041.60
  4. Step 4: Simplify right side
    72,374.40x = 7,612,905,553.92
  5. Step 5: Solve for x
    x = 7,612,905,553.92/72,374.40
  6. Step 6: Final answer
    x = 105,187.82

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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.