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Finding the Fourth Proportional to 96,989.60, 145,250.76 and 65,730.08

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Solution

The fourth proportional to 96,989.60, 145,250.76 and 65,730.08 is: 98,436.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,989.60 : 145,250.76 = 65,730.08 : x
  2. Step 2: Convert to fraction form
    96,989.60/145,250.76 = 65,730.08/x
  3. Step 3: Cross multiply
    96,989.60x = 145,250.76 × 65,730.08
  4. Step 4: Simplify right side
    96,989.60x = 9,547,344,074.86
  5. Step 5: Solve for x
    x = 9,547,344,074.86/96,989.60
  6. Step 6: Final answer
    x = 98,436.78

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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.