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Finding the Fourth Proportional to 66,456.80, 99,620.40 and 59,458.40

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Solution

The fourth proportional to 66,456.80, 99,620.40 and 59,458.40 is: 89,129.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,456.80 : 99,620.40 = 59,458.40 : x
  2. Step 2: Convert to fraction form
    66,456.80/99,620.40 = 59,458.40/x
  3. Step 3: Cross multiply
    66,456.80x = 99,620.40 × 59,458.40
  4. Step 4: Simplify right side
    66,456.80x = 5,923,269,591.36
  5. Step 5: Solve for x
    x = 5,923,269,591.36/66,456.80
  6. Step 6: Final answer
    x = 89,129.62

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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.