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Finding the Fourth Proportional to 89,234.40, 133,592.40 and 86,642.40

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Solution

The fourth proportional to 89,234.40, 133,592.40 and 86,642.40 is: 129,711.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,234.40 : 133,592.40 = 86,642.40 : x
  2. Step 2: Convert to fraction form
    89,234.40/133,592.40 = 86,642.40/x
  3. Step 3: Cross multiply
    89,234.40x = 133,592.40 × 86,642.40
  4. Step 4: Simplify right side
    89,234.40x = 11,574,766,157.76
  5. Step 5: Solve for x
    x = 11,574,766,157.76/89,234.40
  6. Step 6: Final answer
    x = 129,711.93

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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.