Home / 231,005.90-318,784.74-129,032.78

Finding the Fourth Proportional to 231,005.90, 318,784.74 and 129,032.78

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Solution

The fourth proportional to 231,005.90, 318,784.74 and 129,032.78 is: 178,063.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,005.90 : 318,784.74 = 129,032.78 : x
  2. Step 2: Convert to fraction form
    231,005.90/318,784.74 = 129,032.78/x
  3. Step 3: Cross multiply
    231,005.90x = 318,784.74 × 129,032.78
  4. Step 4: Simplify right side
    231,005.90x = 41,133,681,223.78
  5. Step 5: Solve for x
    x = 41,133,681,223.78/231,005.90
  6. Step 6: Final answer
    x = 178,063.34

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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.