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Finding the Fourth Proportional to 66,221.60, 99,332.40 and 65,760.80

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Solution

The fourth proportional to 66,221.60, 99,332.40 and 65,760.80 is: 98,641.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,221.60 : 99,332.40 = 65,760.80 : x
  2. Step 2: Convert to fraction form
    66,221.60/99,332.40 = 65,760.80/x
  3. Step 3: Cross multiply
    66,221.60x = 99,332.40 × 65,760.80
  4. Step 4: Simplify right side
    66,221.60x = 6,532,178,089.92
  5. Step 5: Solve for x
    x = 6,532,178,089.92/66,221.60
  6. Step 6: Final answer
    x = 98,641.20

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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.