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Finding the Fourth Proportional to 65,909.60, 98,864.40 and 49,385.60

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Solution

The fourth proportional to 65,909.60, 98,864.40 and 49,385.60 is: 74,078.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,909.60 : 98,864.40 = 49,385.60 : x
  2. Step 2: Convert to fraction form
    65,909.60/98,864.40 = 49,385.60/x
  3. Step 3: Cross multiply
    65,909.60x = 98,864.40 × 49,385.60
  4. Step 4: Simplify right side
    65,909.60x = 4,882,477,712.64
  5. Step 5: Solve for x
    x = 4,882,477,712.64/65,909.60
  6. Step 6: Final answer
    x = 74,078.40

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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.