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Finding the Fourth Proportional to 79,970.95, 119,885.13 and 40,507.75

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Solution

The fourth proportional to 79,970.95, 119,885.13 and 40,507.75 is: 60,725.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,970.95 : 119,885.13 = 40,507.75 : x
  2. Step 2: Convert to fraction form
    79,970.95/119,885.13 = 40,507.75/x
  3. Step 3: Cross multiply
    79,970.95x = 119,885.13 × 40,507.75
  4. Step 4: Simplify right side
    79,970.95x = 4,856,276,874.76
  5. Step 5: Solve for x
    x = 4,856,276,874.76/79,970.95
  6. Step 6: Final answer
    x = 60,725.51

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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.