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Finding the Fourth Proportional to 99,581, 137,420.04 and 54,259.36

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Solution

The fourth proportional to 99,581, 137,420.04 and 54,259.36 is: 74,876.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,581 : 137,420.04 = 54,259.36 : x
  2. Step 2: Convert to fraction form
    99,581/137,420.04 = 54,259.36/x
  3. Step 3: Cross multiply
    99,581x = 137,420.04 × 54,259.36
  4. Step 4: Simplify right side
    99,581x = 7,456,323,213.67
  5. Step 5: Solve for x
    x = 7,456,323,213.67/99,581
  6. Step 6: Final answer
    x = 74,876.97

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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.