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Finding the Fourth Proportional to 108,377.40, 162,566.10 and 78,655.80

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Solution

The fourth proportional to 108,377.40, 162,566.10 and 78,655.80 is: 117,983.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,377.40 : 162,566.10 = 78,655.80 : x
  2. Step 2: Convert to fraction form
    108,377.40/162,566.10 = 78,655.80/x
  3. Step 3: Cross multiply
    108,377.40x = 162,566.10 × 78,655.80
  4. Step 4: Simplify right side
    108,377.40x = 12,786,766,648.38
  5. Step 5: Solve for x
    x = 12,786,766,648.38/108,377.40
  6. Step 6: Final answer
    x = 117,983.70

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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.