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Finding the Fourth Proportional to 99,578.78, 137,416.98 and 54,257.13

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Solution

The fourth proportional to 99,578.78, 137,416.98 and 54,257.13 is: 74,873.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,578.78 : 137,416.98 = 54,257.13 : x
  2. Step 2: Convert to fraction form
    99,578.78/137,416.98 = 54,257.13/x
  3. Step 3: Cross multiply
    99,578.78x = 137,416.98 × 54,257.13
  4. Step 4: Simplify right side
    99,578.78x = 7,455,850,948.07
  5. Step 5: Solve for x
    x = 7,455,850,948.07/99,578.78
  6. Step 6: Final answer
    x = 74,873.90

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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.