Home / 129,931.36-194,915.49-39,981.52

Finding the Fourth Proportional to 129,931.36, 194,915.49 and 39,981.52

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Solution

The fourth proportional to 129,931.36, 194,915.49 and 39,981.52 is: 59,977.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,931.36 : 194,915.49 = 39,981.52 : x
  2. Step 2: Convert to fraction form
    129,931.36/194,915.49 = 39,981.52/x
  3. Step 3: Cross multiply
    129,931.36x = 194,915.49 × 39,981.52
  4. Step 4: Simplify right side
    129,931.36x = 7,793,017,561.74
  5. Step 5: Solve for x
    x = 7,793,017,561.74/129,931.36
  6. Step 6: Final answer
    x = 59,977.96

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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.