Home / 129,428.40-194,142.47-40,689.66

Finding the Fourth Proportional to 129,428.40, 194,142.47 and 40,689.66

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Solution

The fourth proportional to 129,428.40, 194,142.47 and 40,689.66 is: 61,034.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,428.40 : 194,142.47 = 40,689.66 : x
  2. Step 2: Convert to fraction form
    129,428.40/194,142.47 = 40,689.66/x
  3. Step 3: Cross multiply
    129,428.40x = 194,142.47 × 40,689.66
  4. Step 4: Simplify right side
    129,428.40x = 7,899,590,892.41
  5. Step 5: Solve for x
    x = 7,899,590,892.41/129,428.40
  6. Step 6: Final answer
    x = 61,034.45

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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.