Home / 120,017.28-165,637.92-72,294.72

Finding the Fourth Proportional to 120,017.28, 165,637.92 and 72,294.72

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Solution

The fourth proportional to 120,017.28, 165,637.92 and 72,294.72 is: 99,775.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,017.28 : 165,637.92 = 72,294.72 : x
  2. Step 2: Convert to fraction form
    120,017.28/165,637.92 = 72,294.72/x
  3. Step 3: Cross multiply
    120,017.28x = 165,637.92 × 72,294.72
  4. Step 4: Simplify right side
    120,017.28x = 11,974,747,047.78
  5. Step 5: Solve for x
    x = 11,974,747,047.78/120,017.28
  6. Step 6: Final answer
    x = 99,775.19

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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.