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Finding the Fourth Proportional to 99,911.58, 137,876.34 and 54,588.58

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Solution

The fourth proportional to 99,911.58, 137,876.34 and 54,588.58 is: 75,331.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,911.58 : 137,876.34 = 54,588.58 : x
  2. Step 2: Convert to fraction form
    99,911.58/137,876.34 = 54,588.58/x
  3. Step 3: Cross multiply
    99,911.58x = 137,876.34 × 54,588.58
  4. Step 4: Simplify right side
    99,911.58x = 7,526,473,616.20
  5. Step 5: Solve for x
    x = 7,526,473,616.20/99,911.58
  6. Step 6: Final answer
    x = 75,331.34

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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.