Home / 129,526.57-178,754.75-78,543.82

Finding the Fourth Proportional to 129,526.57, 178,754.75 and 78,543.82

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Solution

The fourth proportional to 129,526.57, 178,754.75 and 78,543.82 is: 108,395.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,526.57 : 178,754.75 = 78,543.82 : x
  2. Step 2: Convert to fraction form
    129,526.57/178,754.75 = 78,543.82/x
  3. Step 3: Cross multiply
    129,526.57x = 178,754.75 × 78,543.82
  4. Step 4: Simplify right side
    129,526.57x = 14,040,080,908.15
  5. Step 5: Solve for x
    x = 14,040,080,908.15/129,526.57
  6. Step 6: Final answer
    x = 108,395.37

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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.