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Finding the Fourth Proportional to 99,079.80, 148,638.90 and 49,831.80

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Solution

The fourth proportional to 99,079.80, 148,638.90 and 49,831.80 is: 74,757.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,079.80 : 148,638.90 = 49,831.80 : x
  2. Step 2: Convert to fraction form
    99,079.80/148,638.90 = 49,831.80/x
  3. Step 3: Cross multiply
    99,079.80x = 148,638.90 × 49,831.80
  4. Step 4: Simplify right side
    99,079.80x = 7,406,943,937.02
  5. Step 5: Solve for x
    x = 7,406,943,937.02/99,079.80
  6. Step 6: Final answer
    x = 74,757.36

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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.