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Finding the Fourth Proportional to 159,780.51, 220,577 and 99,370.61

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Solution

The fourth proportional to 159,780.51, 220,577 and 99,370.61 is: 137,181.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,780.51 : 220,577 = 99,370.61 : x
  2. Step 2: Convert to fraction form
    159,780.51/220,577 = 99,370.61/x
  3. Step 3: Cross multiply
    159,780.51x = 220,577 × 99,370.61
  4. Step 4: Simplify right side
    159,780.51x = 21,918,871,041.97
  5. Step 5: Solve for x
    x = 21,918,871,041.97/159,780.51
  6. Step 6: Final answer
    x = 137,181.13

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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.