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Finding the Fourth Proportional to 78,037.61, 107,692.39 and 45,765.64

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Solution

The fourth proportional to 78,037.61, 107,692.39 and 45,765.64 is: 63,156.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,037.61 : 107,692.39 = 45,765.64 : x
  2. Step 2: Convert to fraction form
    78,037.61/107,692.39 = 45,765.64/x
  3. Step 3: Cross multiply
    78,037.61x = 107,692.39 × 45,765.64
  4. Step 4: Simplify right side
    78,037.61x = 4,928,611,545.23
  5. Step 5: Solve for x
    x = 4,928,611,545.23/78,037.61
  6. Step 6: Final answer
    x = 63,156.88

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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.