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Finding the Fourth Proportional to 108,020.20, 149,123.93 and 78,915.93

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Solution

The fourth proportional to 108,020.20, 149,123.93 and 78,915.93 is: 108,944.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,020.20 : 149,123.93 = 78,915.93 : x
  2. Step 2: Convert to fraction form
    108,020.20/149,123.93 = 78,915.93/x
  3. Step 3: Cross multiply
    108,020.20x = 149,123.93 × 78,915.93
  4. Step 4: Simplify right side
    108,020.20x = 11,768,253,382.82
  5. Step 5: Solve for x
    x = 11,768,253,382.82/108,020.20
  6. Step 6: Final answer
    x = 108,944.93

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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.