Home / 129,035.45-178,063.15-71,678.75

Finding the Fourth Proportional to 129,035.45, 178,063.15 and 71,678.75

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Solution

The fourth proportional to 129,035.45, 178,063.15 and 71,678.75 is: 98,913.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,035.45 : 178,063.15 = 71,678.75 : x
  2. Step 2: Convert to fraction form
    129,035.45/178,063.15 = 71,678.75/x
  3. Step 3: Cross multiply
    129,035.45x = 178,063.15 × 71,678.75
  4. Step 4: Simplify right side
    129,035.45x = 12,763,344,604.76
  5. Step 5: Solve for x
    x = 12,763,344,604.76/129,035.45
  6. Step 6: Final answer
    x = 98,913.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.