Home / 129,315.56-178,428.72-75,590.18

Finding the Fourth Proportional to 129,315.56, 178,428.72 and 75,590.18

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Solution

The fourth proportional to 129,315.56, 178,428.72 and 75,590.18 is: 104,298.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,315.56 : 178,428.72 = 75,590.18 : x
  2. Step 2: Convert to fraction form
    129,315.56/178,428.72 = 75,590.18/x
  3. Step 3: Cross multiply
    129,315.56x = 178,428.72 × 75,590.18
  4. Step 4: Simplify right side
    129,315.56x = 13,487,459,508.04
  5. Step 5: Solve for x
    x = 13,487,459,508.04/129,315.56
  6. Step 6: Final answer
    x = 104,298.81

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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.