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Finding the Fourth Proportional to 89,246.40, 133,610.40 and 86,654.40

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Solution

The fourth proportional to 89,246.40, 133,610.40 and 86,654.40 is: 129,729.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,246.40 : 133,610.40 = 86,654.40 : x
  2. Step 2: Convert to fraction form
    89,246.40/133,610.40 = 86,654.40/x
  3. Step 3: Cross multiply
    89,246.40x = 133,610.40 × 86,654.40
  4. Step 4: Simplify right side
    89,246.40x = 11,577,929,045.76
  5. Step 5: Solve for x
    x = 11,577,929,045.76/89,246.40
  6. Step 6: Final answer
    x = 129,729.93

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1.5x scale

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.