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Finding the Fourth Proportional to 97,221.20, 145,831.80 and 65,728.40

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Solution

The fourth proportional to 97,221.20, 145,831.80 and 65,728.40 is: 98,592.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,221.20 : 145,831.80 = 65,728.40 : x
  2. Step 2: Convert to fraction form
    97,221.20/145,831.80 = 65,728.40/x
  3. Step 3: Cross multiply
    97,221.20x = 145,831.80 × 65,728.40
  4. Step 4: Simplify right side
    97,221.20x = 9,585,290,883.12
  5. Step 5: Solve for x
    x = 9,585,290,883.12/97,221.20
  6. Step 6: Final answer
    x = 98,592.60

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Similar ratio
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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.