Home / 129,986.64-179,394.12-78,988.14

Finding the Fourth Proportional to 129,986.64, 179,394.12 and 78,988.14

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Solution

The fourth proportional to 129,986.64, 179,394.12 and 78,988.14 is: 109,011.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,986.64 : 179,394.12 = 78,988.14 : x
  2. Step 2: Convert to fraction form
    129,986.64/179,394.12 = 78,988.14/x
  3. Step 3: Cross multiply
    129,986.64x = 179,394.12 × 78,988.14
  4. Step 4: Simplify right side
    129,986.64x = 14,170,007,865.74
  5. Step 5: Solve for x
    x = 14,170,007,865.74/129,986.64
  6. Step 6: Final answer
    x = 109,011.26

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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.