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Finding the Fourth Proportional to 229,513.86, 316,636.65 and 138,712.18

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Solution

The fourth proportional to 229,513.86, 316,636.65 and 138,712.18 is: 191,366.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,513.86 : 316,636.65 = 138,712.18 : x
  2. Step 2: Convert to fraction form
    229,513.86/316,636.65 = 138,712.18/x
  3. Step 3: Cross multiply
    229,513.86x = 316,636.65 × 138,712.18
  4. Step 4: Simplify right side
    229,513.86x = 43,921,359,989.40
  5. Step 5: Solve for x
    x = 43,921,359,989.40/229,513.86
  6. Step 6: Final answer
    x = 191,366.92

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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.