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Finding the Fourth Proportional to 225,078.15, 310,573.36 and 129,566.40

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Solution

The fourth proportional to 225,078.15, 310,573.36 and 129,566.40 is: 178,781.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,078.15 : 310,573.36 = 129,566.40 : x
  2. Step 2: Convert to fraction form
    225,078.15/310,573.36 = 129,566.40/x
  3. Step 3: Cross multiply
    225,078.15x = 310,573.36 × 129,566.40
  4. Step 4: Simplify right side
    225,078.15x = 40,239,872,191.10
  5. Step 5: Solve for x
    x = 40,239,872,191.10/225,078.15
  6. Step 6: Final answer
    x = 178,781.78

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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.