Home / 129,787.48-179,145.03-76,084.12

Finding the Fourth Proportional to 129,787.48, 179,145.03 and 76,084.12

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Solution

The fourth proportional to 129,787.48, 179,145.03 and 76,084.12 is: 105,018.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,787.48 : 179,145.03 = 76,084.12 : x
  2. Step 2: Convert to fraction form
    129,787.48/179,145.03 = 76,084.12/x
  3. Step 3: Cross multiply
    129,787.48x = 179,145.03 × 76,084.12
  4. Step 4: Simplify right side
    129,787.48x = 13,630,092,041.20
  5. Step 5: Solve for x
    x = 13,630,092,041.20/129,787.48
  6. Step 6: Final answer
    x = 105,018.54

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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.