Home / 145,155.91-217,759.40-66,278.11

Finding the Fourth Proportional to 145,155.91, 217,759.40 and 66,278.11

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Solution

The fourth proportional to 145,155.91, 217,759.40 and 66,278.11 is: 99,428.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,155.91 : 217,759.40 = 66,278.11 : x
  2. Step 2: Convert to fraction form
    145,155.91/217,759.40 = 66,278.11/x
  3. Step 3: Cross multiply
    145,155.91x = 217,759.40 × 66,278.11
  4. Step 4: Simplify right side
    145,155.91x = 14,432,681,135.34
  5. Step 5: Solve for x
    x = 14,432,681,135.34/145,155.91
  6. Step 6: Final answer
    x = 99,428.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.