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Finding the Fourth Proportional to 129,615.40, 194,034.30 and 121,925.80

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Solution

The fourth proportional to 129,615.40, 194,034.30 and 121,925.80 is: 182,522.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,615.40 : 194,034.30 = 121,925.80 : x
  2. Step 2: Convert to fraction form
    129,615.40/194,034.30 = 121,925.80/x
  3. Step 3: Cross multiply
    129,615.40x = 194,034.30 × 121,925.80
  4. Step 4: Simplify right side
    129,615.40x = 23,657,787,254.94
  5. Step 5: Solve for x
    x = 23,657,787,254.94/129,615.40
  6. Step 6: Final answer
    x = 182,522.97

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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.