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Finding the Fourth Proportional to 100,818.80, 151,055.40 and 65,740.40

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Solution

The fourth proportional to 100,818.80, 151,055.40 and 65,740.40 is: 98,497.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,818.80 : 151,055.40 = 65,740.40 : x
  2. Step 2: Convert to fraction form
    100,818.80/151,055.40 = 65,740.40/x
  3. Step 3: Cross multiply
    100,818.80x = 151,055.40 × 65,740.40
  4. Step 4: Simplify right side
    100,818.80x = 9,930,442,418.16
  5. Step 5: Solve for x
    x = 9,930,442,418.16/100,818.80
  6. Step 6: Final answer
    x = 98,497.92

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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.