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Finding the Fourth Proportional to 99,855.49, 137,801.66 and 54,534.80

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Solution

The fourth proportional to 99,855.49, 137,801.66 and 54,534.80 is: 75,258.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,855.49 : 137,801.66 = 54,534.80 : x
  2. Step 2: Convert to fraction form
    99,855.49/137,801.66 = 54,534.80/x
  3. Step 3: Cross multiply
    99,855.49x = 137,801.66 × 54,534.80
  4. Step 4: Simplify right side
    99,855.49x = 7,514,985,967.77
  5. Step 5: Solve for x
    x = 7,514,985,967.77/99,855.49
  6. Step 6: Final answer
    x = 75,258.62

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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.