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Finding the Fourth Proportional to 88,689.40, 133,034.10 and 68,860.60

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Solution

The fourth proportional to 88,689.40, 133,034.10 and 68,860.60 is: 103,290.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,689.40 : 133,034.10 = 68,860.60 : x
  2. Step 2: Convert to fraction form
    88,689.40/133,034.10 = 68,860.60/x
  3. Step 3: Cross multiply
    88,689.40x = 133,034.10 × 68,860.60
  4. Step 4: Simplify right side
    88,689.40x = 9,160,807,946.46
  5. Step 5: Solve for x
    x = 9,160,807,946.46/88,689.40
  6. Step 6: Final answer
    x = 103,290.90

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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.