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Finding the Fourth Proportional to 107,787.32, 161,750.16 and 72,288.74

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Solution

The fourth proportional to 107,787.32, 161,750.16 and 72,288.74 is: 108,479.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,787.32 : 161,750.16 = 72,288.74 : x
  2. Step 2: Convert to fraction form
    107,787.32/161,750.16 = 72,288.74/x
  3. Step 3: Cross multiply
    107,787.32x = 161,750.16 × 72,288.74
  4. Step 4: Simplify right side
    107,787.32x = 11,692,715,261.20
  5. Step 5: Solve for x
    x = 11,692,715,261.20/107,787.32
  6. Step 6: Final answer
    x = 108,479.51

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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.