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Finding the Fourth Proportional to 100,273.50, 138,377.70 and 55,561.50

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Solution

The fourth proportional to 100,273.50, 138,377.70 and 55,561.50 is: 76,675.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,273.50 : 138,377.70 = 55,561.50 : x
  2. Step 2: Convert to fraction form
    100,273.50/138,377.70 = 55,561.50/x
  3. Step 3: Cross multiply
    100,273.50x = 138,377.70 × 55,561.50
  4. Step 4: Simplify right side
    100,273.50x = 7,688,472,578.55
  5. Step 5: Solve for x
    x = 7,688,472,578.55/100,273.50
  6. Step 6: Final answer
    x = 76,675.02

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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.