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Finding the Fourth Proportional to 129,715.92, 194,622.48 and 45,482.40

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Solution

The fourth proportional to 129,715.92, 194,622.48 and 45,482.40 is: 68,240.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,715.92 : 194,622.48 = 45,482.40 : x
  2. Step 2: Convert to fraction form
    129,715.92/194,622.48 = 45,482.40/x
  3. Step 3: Cross multiply
    129,715.92x = 194,622.48 × 45,482.40
  4. Step 4: Simplify right side
    129,715.92x = 8,851,897,484.35
  5. Step 5: Solve for x
    x = 8,851,897,484.35/129,715.92
  6. Step 6: Final answer
    x = 68,240.64

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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.