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Finding the Fourth Proportional to 100,350.70, 138,483.87 and 55,029.40

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Solution

The fourth proportional to 100,350.70, 138,483.87 and 55,029.40 is: 75,940.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,350.70 : 138,483.87 = 55,029.40 : x
  2. Step 2: Convert to fraction form
    100,350.70/138,483.87 = 55,029.40/x
  3. Step 3: Cross multiply
    100,350.70x = 138,483.87 × 55,029.40
  4. Step 4: Simplify right side
    100,350.70x = 7,620,684,275.78
  5. Step 5: Solve for x
    x = 7,620,684,275.78/100,350.70
  6. Step 6: Final answer
    x = 75,940.52

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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.