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Finding the Fourth Proportional to 72,882.32, 109,154.03 and 70,356.87

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Solution

The fourth proportional to 72,882.32, 109,154.03 and 70,356.87 is: 105,371.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,882.32 : 109,154.03 = 70,356.87 : x
  2. Step 2: Convert to fraction form
    72,882.32/109,154.03 = 70,356.87/x
  3. Step 3: Cross multiply
    72,882.32x = 109,154.03 × 70,356.87
  4. Step 4: Simplify right side
    72,882.32x = 7,679,735,546.90
  5. Step 5: Solve for x
    x = 7,679,735,546.90/72,882.32
  6. Step 6: Final answer
    x = 105,371.73

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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.