Home / 129,670.38-178,948.28-72,309.14

Finding the Fourth Proportional to 129,670.38, 178,948.28 and 72,309.14

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Solution

The fourth proportional to 129,670.38, 178,948.28 and 72,309.14 is: 99,788.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,670.38 : 178,948.28 = 72,309.14 : x
  2. Step 2: Convert to fraction form
    129,670.38/178,948.28 = 72,309.14/x
  3. Step 3: Cross multiply
    129,670.38x = 178,948.28 × 72,309.14
  4. Step 4: Simplify right side
    129,670.38x = 12,939,596,231.28
  5. Step 5: Solve for x
    x = 12,939,596,231.28/129,670.38
  6. Step 6: Final answer
    x = 99,788.37

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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.