Home / 231,018.48-318,802.04-129,045.78

Finding the Fourth Proportional to 231,018.48, 318,802.04 and 129,045.78

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Solution

The fourth proportional to 231,018.48, 318,802.04 and 129,045.78 is: 178,081.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,018.48 : 318,802.04 = 129,045.78 : x
  2. Step 2: Convert to fraction form
    231,018.48/318,802.04 = 129,045.78/x
  3. Step 3: Cross multiply
    231,018.48x = 318,802.04 × 129,045.78
  4. Step 4: Simplify right side
    231,018.48x = 41,140,057,917.39
  5. Step 5: Solve for x
    x = 41,140,057,917.39/231,018.48
  6. Step 6: Final answer
    x = 178,081.24

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1.5x scale

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.