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Finding the Fourth Proportional to 124,447.89, 171,689.31 and 76,618.20

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Solution

The fourth proportional to 124,447.89, 171,689.31 and 76,618.20 is: 105,703.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,447.89 : 171,689.31 = 76,618.20 : x
  2. Step 2: Convert to fraction form
    124,447.89/171,689.31 = 76,618.20/x
  3. Step 3: Cross multiply
    124,447.89x = 171,689.31 × 76,618.20
  4. Step 4: Simplify right side
    124,447.89x = 13,154,525,891.44
  5. Step 5: Solve for x
    x = 13,154,525,891.44/124,447.89
  6. Step 6: Final answer
    x = 105,703.08

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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.