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Finding the Fourth Proportional to 118,697.40, 178,434.90 and 83,878.20

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Solution

The fourth proportional to 118,697.40, 178,434.90 and 83,878.20 is: 126,092.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,697.40 : 178,434.90 = 83,878.20 : x
  2. Step 2: Convert to fraction form
    118,697.40/178,434.90 = 83,878.20/x
  3. Step 3: Cross multiply
    118,697.40x = 178,434.90 × 83,878.20
  4. Step 4: Simplify right side
    118,697.40x = 14,966,798,229.18
  5. Step 5: Solve for x
    x = 14,966,798,229.18/118,697.40
  6. Step 6: Final answer
    x = 126,092.05

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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.