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Finding the Fourth Proportional to 129,009.40, 193,514.10 and 34,239.40

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Solution

The fourth proportional to 129,009.40, 193,514.10 and 34,239.40 is: 51,359.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,009.40 : 193,514.10 = 34,239.40 : x
  2. Step 2: Convert to fraction form
    129,009.40/193,514.10 = 34,239.40/x
  3. Step 3: Cross multiply
    129,009.40x = 193,514.10 × 34,239.40
  4. Step 4: Simplify right side
    129,009.40x = 6,625,806,675.54
  5. Step 5: Solve for x
    x = 6,625,806,675.54/129,009.40
  6. Step 6: Final answer
    x = 51,359.10

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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.