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Finding the Fourth Proportional to 89,980.78, 124,170.13 and 49,693.68

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Solution

The fourth proportional to 89,980.78, 124,170.13 and 49,693.68 is: 68,575.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,980.78 : 124,170.13 = 49,693.68 : x
  2. Step 2: Convert to fraction form
    89,980.78/124,170.13 = 49,693.68/x
  3. Step 3: Cross multiply
    89,980.78x = 124,170.13 × 49,693.68
  4. Step 4: Simplify right side
    89,980.78x = 6,170,470,680.52
  5. Step 5: Solve for x
    x = 6,170,470,680.52/89,980.78
  6. Step 6: Final answer
    x = 68,575.43

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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.