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Finding the Fourth Proportional to 89,250.40, 133,616.40 and 86,658.40

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Solution

The fourth proportional to 89,250.40, 133,616.40 and 86,658.40 is: 129,735.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,250.40 : 133,616.40 = 86,658.40 : x
  2. Step 2: Convert to fraction form
    89,250.40/133,616.40 = 86,658.40/x
  3. Step 3: Cross multiply
    89,250.40x = 133,616.40 × 86,658.40
  4. Step 4: Simplify right side
    89,250.40x = 11,578,983,437.76
  5. Step 5: Solve for x
    x = 11,578,983,437.76/89,250.40
  6. Step 6: Final answer
    x = 129,735.93

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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.