Home / 129,260.81-178,390.69-71,910.93

Finding the Fourth Proportional to 129,260.81, 178,390.69 and 71,910.93

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Solution

The fourth proportional to 129,260.81, 178,390.69 and 71,910.93 is: 99,243.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,260.81 : 178,390.69 = 71,910.93 : x
  2. Step 2: Convert to fraction form
    129,260.81/178,390.69 = 71,910.93/x
  3. Step 3: Cross multiply
    129,260.81x = 178,390.69 × 71,910.93
  4. Step 4: Simplify right side
    129,260.81x = 12,828,240,508.53
  5. Step 5: Solve for x
    x = 12,828,240,508.53/129,260.81
  6. Step 6: Final answer
    x = 99,243.08

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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.