Home / 129,836.79-179,204.63-76,139.10

Finding the Fourth Proportional to 129,836.79, 179,204.63 and 76,139.10

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Solution

The fourth proportional to 129,836.79, 179,204.63 and 76,139.10 is: 105,089.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,836.79 : 179,204.63 = 76,139.10 : x
  2. Step 2: Convert to fraction form
    129,836.79/179,204.63 = 76,139.10/x
  3. Step 3: Cross multiply
    129,836.79x = 179,204.63 × 76,139.10
  4. Step 4: Simplify right side
    129,836.79x = 13,644,478,863.34
  5. Step 5: Solve for x
    x = 13,644,478,863.34/129,836.79
  6. Step 6: Final answer
    x = 105,089.47

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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.