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Finding the Fourth Proportional to 228,689.25, 315,587.10 and 126,712.68

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Solution

The fourth proportional to 228,689.25, 315,587.10 and 126,712.68 is: 174,861.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,689.25 : 315,587.10 = 126,712.68 : x
  2. Step 2: Convert to fraction form
    228,689.25/315,587.10 = 126,712.68/x
  3. Step 3: Cross multiply
    228,689.25x = 315,587.10 × 126,712.68
  4. Step 4: Simplify right side
    228,689.25x = 39,988,887,214.43
  5. Step 5: Solve for x
    x = 39,988,887,214.43/228,689.25
  6. Step 6: Final answer
    x = 174,861.25

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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.