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Finding the Fourth Proportional to 101,780.88, 140,454.28 and 61,487.60

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Solution

The fourth proportional to 101,780.88, 140,454.28 and 61,487.60 is: 84,850.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,780.88 : 140,454.28 = 61,487.60 : x
  2. Step 2: Convert to fraction form
    101,780.88/140,454.28 = 61,487.60/x
  3. Step 3: Cross multiply
    101,780.88x = 140,454.28 × 61,487.60
  4. Step 4: Simplify right side
    101,780.88x = 8,636,196,586.93
  5. Step 5: Solve for x
    x = 8,636,196,586.93/101,780.88
  6. Step 6: Final answer
    x = 84,850.87

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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.