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Finding the Fourth Proportional to 123,742.76, 170,765.12 and 67,154.13

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Solution

The fourth proportional to 123,742.76, 170,765.12 and 67,154.13 is: 92,672.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,742.76 : 170,765.12 = 67,154.13 : x
  2. Step 2: Convert to fraction form
    123,742.76/170,765.12 = 67,154.13/x
  3. Step 3: Cross multiply
    123,742.76x = 170,765.12 × 67,154.13
  4. Step 4: Simplify right side
    123,742.76x = 11,467,583,235.83
  5. Step 5: Solve for x
    x = 11,467,583,235.83/123,742.76
  6. Step 6: Final answer
    x = 92,672.76

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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.