Home / 91,117.28-136,675.10-28,787.78

Finding the Fourth Proportional to 91,117.28, 136,675.10 and 28,787.78

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Solution

The fourth proportional to 91,117.28, 136,675.10 and 28,787.78 is: 43,181.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,117.28 : 136,675.10 = 28,787.78 : x
  2. Step 2: Convert to fraction form
    91,117.28/136,675.10 = 28,787.78/x
  3. Step 3: Cross multiply
    91,117.28x = 136,675.10 × 28,787.78
  4. Step 4: Simplify right side
    91,117.28x = 3,934,572,710.28
  5. Step 5: Solve for x
    x = 3,934,572,710.28/91,117.28
  6. Step 6: Final answer
    x = 43,181.41

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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.