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Finding the Fourth Proportional to 159,780.76, 220,577.33 and 99,370.87

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Solution

The fourth proportional to 159,780.76, 220,577.33 and 99,370.87 is: 137,181.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,780.76 : 220,577.33 = 99,370.87 : x
  2. Step 2: Convert to fraction form
    159,780.76/220,577.33 = 99,370.87/x
  3. Step 3: Cross multiply
    159,780.76x = 220,577.33 × 99,370.87
  4. Step 4: Simplify right side
    159,780.76x = 21,918,960,881.36
  5. Step 5: Solve for x
    x = 21,918,960,881.36/159,780.76
  6. Step 6: Final answer
    x = 137,181.48

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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.