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Finding the Fourth Proportional to 100,708.80, 150,890.40 and 65,630.40

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Solution

The fourth proportional to 100,708.80, 150,890.40 and 65,630.40 is: 98,332.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,708.80 : 150,890.40 = 65,630.40 : x
  2. Step 2: Convert to fraction form
    100,708.80/150,890.40 = 65,630.40/x
  3. Step 3: Cross multiply
    100,708.80x = 150,890.40 × 65,630.40
  4. Step 4: Simplify right side
    100,708.80x = 9,902,997,308.16
  5. Step 5: Solve for x
    x = 9,902,997,308.16/100,708.80
  6. Step 6: Final answer
    x = 98,332.99

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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.