Home / 126,079.47-189,179.28-78,681.69

Finding the Fourth Proportional to 126,079.47, 189,179.28 and 78,681.69

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Solution

The fourth proportional to 126,079.47, 189,179.28 and 78,681.69 is: 118,060.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,079.47 : 189,179.28 = 78,681.69 : x
  2. Step 2: Convert to fraction form
    126,079.47/189,179.28 = 78,681.69/x
  3. Step 3: Cross multiply
    126,079.47x = 189,179.28 × 78,681.69
  4. Step 4: Simplify right side
    126,079.47x = 14,884,945,463.38
  5. Step 5: Solve for x
    x = 14,884,945,463.38/126,079.47
  6. Step 6: Final answer
    x = 118,060.03

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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.