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Finding the Fourth Proportional to 118,607.92, 163,629.66 and 77,760.88

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Solution

The fourth proportional to 118,607.92, 163,629.66 and 77,760.88 is: 107,277.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,607.92 : 163,629.66 = 77,760.88 : x
  2. Step 2: Convert to fraction form
    118,607.92/163,629.66 = 77,760.88/x
  3. Step 3: Cross multiply
    118,607.92x = 163,629.66 × 77,760.88
  4. Step 4: Simplify right side
    118,607.92x = 12,723,986,355.70
  5. Step 5: Solve for x
    x = 12,723,986,355.70/118,607.92
  6. Step 6: Final answer
    x = 107,277.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.