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Finding the Fourth Proportional to 231,399.40, 319,326.18 and 125,415.40

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Solution

The fourth proportional to 231,399.40, 319,326.18 and 125,415.40 is: 173,070.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,399.40 : 319,326.18 = 125,415.40 : x
  2. Step 2: Convert to fraction form
    231,399.40/319,326.18 = 125,415.40/x
  3. Step 3: Cross multiply
    231,399.40x = 319,326.18 × 125,415.40
  4. Step 4: Simplify right side
    231,399.40x = 40,048,420,595.17
  5. Step 5: Solve for x
    x = 40,048,420,595.17/231,399.40
  6. Step 6: Final answer
    x = 173,070.55

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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.