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Finding the Fourth Proportional to 129,637.76, 194,456.62 and 31,141.76

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Solution

The fourth proportional to 129,637.76, 194,456.62 and 31,141.76 is: 46,712.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,637.76 : 194,456.62 = 31,141.76 : x
  2. Step 2: Convert to fraction form
    129,637.76/194,456.62 = 31,141.76/x
  3. Step 3: Cross multiply
    129,637.76x = 194,456.62 × 31,141.76
  4. Step 4: Simplify right side
    129,637.76x = 6,055,721,390.45
  5. Step 5: Solve for x
    x = 6,055,721,390.45/129,637.76
  6. Step 6: Final answer
    x = 46,712.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.