Home / 129,430.69-178,669.46-87,013.82

Finding the Fourth Proportional to 129,430.69, 178,669.46 and 87,013.82

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Solution

The fourth proportional to 129,430.69, 178,669.46 and 87,013.82 is: 120,116.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,430.69 : 178,669.46 = 87,013.82 : x
  2. Step 2: Convert to fraction form
    129,430.69/178,669.46 = 87,013.82/x
  3. Step 3: Cross multiply
    129,430.69x = 178,669.46 × 87,013.82
  4. Step 4: Simplify right side
    129,430.69x = 15,546,712,231.94
  5. Step 5: Solve for x
    x = 15,546,712,231.94/129,430.69
  6. Step 6: Final answer
    x = 120,116.12

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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.