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Finding the Fourth Proportional to 118,421.20, 163,493.76 and 112,737.76

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Solution

The fourth proportional to 118,421.20, 163,493.76 and 112,737.76 is: 155,647.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,421.20 : 163,493.76 = 112,737.76 : x
  2. Step 2: Convert to fraction form
    118,421.20/163,493.76 = 112,737.76/x
  3. Step 3: Cross multiply
    118,421.20x = 163,493.76 × 112,737.76
  4. Step 4: Simplify right side
    118,421.20x = 18,431,920,276.38
  5. Step 5: Solve for x
    x = 18,431,920,276.38/118,421.20
  6. Step 6: Final answer
    x = 155,647.13

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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.