Home / 129,931.47-194,915.68-39,981.65

Finding the Fourth Proportional to 129,931.47, 194,915.68 and 39,981.65

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Solution

The fourth proportional to 129,931.47, 194,915.68 and 39,981.65 is: 59,978.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,931.47 : 194,915.68 = 39,981.65 : x
  2. Step 2: Convert to fraction form
    129,931.47/194,915.68 = 39,981.65/x
  3. Step 3: Cross multiply
    129,931.47x = 194,915.68 × 39,981.65
  4. Step 4: Simplify right side
    129,931.47x = 7,793,049,422.74
  5. Step 5: Solve for x
    x = 7,793,049,422.74/129,931.47
  6. Step 6: Final answer
    x = 59,978.15

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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.