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Finding the Fourth Proportional to 99,228.60, 148,697.10 and 39,960.90

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Solution

The fourth proportional to 99,228.60, 148,697.10 and 39,960.90 is: 59,882.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,228.60 : 148,697.10 = 39,960.90 : x
  2. Step 2: Convert to fraction form
    99,228.60/148,697.10 = 39,960.90/x
  3. Step 3: Cross multiply
    99,228.60x = 148,697.10 × 39,960.90
  4. Step 4: Simplify right side
    99,228.60x = 5,942,069,943.39
  5. Step 5: Solve for x
    x = 5,942,069,943.39/99,228.60
  6. Step 6: Final answer
    x = 59,882.63

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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.