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Finding the Fourth Proportional to 126,000.78, 173,880.99 and 69,412.15

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Solution

The fourth proportional to 126,000.78, 173,880.99 and 69,412.15 is: 95,788.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,000.78 : 173,880.99 = 69,412.15 : x
  2. Step 2: Convert to fraction form
    126,000.78/173,880.99 = 69,412.15/x
  3. Step 3: Cross multiply
    126,000.78x = 173,880.99 × 69,412.15
  4. Step 4: Simplify right side
    126,000.78x = 12,069,453,360.03
  5. Step 5: Solve for x
    x = 12,069,453,360.03/126,000.78
  6. Step 6: Final answer
    x = 95,788.72

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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.