Home / 129,307.98-178,423.26-71,939.82

Finding the Fourth Proportional to 129,307.98, 178,423.26 and 71,939.82

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Solution

The fourth proportional to 129,307.98, 178,423.26 and 71,939.82 is: 99,264.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,307.98 : 178,423.26 = 71,939.82 : x
  2. Step 2: Convert to fraction form
    129,307.98/178,423.26 = 71,939.82/x
  3. Step 3: Cross multiply
    129,307.98x = 178,423.26 × 71,939.82
  4. Step 4: Simplify right side
    129,307.98x = 12,835,737,208.21
  5. Step 5: Solve for x
    x = 12,835,737,208.21/129,307.98
  6. Step 6: Final answer
    x = 99,264.85

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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.