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Finding the Fourth Proportional to 123,478.74, 170,401.50 and 66,890.16

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Solution

The fourth proportional to 123,478.74, 170,401.50 and 66,890.16 is: 92,308.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,478.74 : 170,401.50 = 66,890.16 : x
  2. Step 2: Convert to fraction form
    123,478.74/170,401.50 = 66,890.16/x
  3. Step 3: Cross multiply
    123,478.74x = 170,401.50 × 66,890.16
  4. Step 4: Simplify right side
    123,478.74x = 11,398,183,599.24
  5. Step 5: Solve for x
    x = 11,398,183,599.24/123,478.74
  6. Step 6: Final answer
    x = 92,308.88

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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.