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Finding the Fourth Proportional to 99,901.44, 137,548.80 and 81,100.80

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Solution

The fourth proportional to 99,901.44, 137,548.80 and 81,100.80 is: 111,663.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,901.44 : 137,548.80 = 81,100.80 : x
  2. Step 2: Convert to fraction form
    99,901.44/137,548.80 = 81,100.80/x
  3. Step 3: Cross multiply
    99,901.44x = 137,548.80 × 81,100.80
  4. Step 4: Simplify right side
    99,901.44x = 11,155,317,719.04
  5. Step 5: Solve for x
    x = 11,155,317,719.04/99,901.44
  6. Step 6: Final answer
    x = 111,663.23

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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.