Home / 100,225.02-138,310.40-54,905.78

Finding the Fourth Proportional to 100,225.02, 138,310.40 and 54,905.78

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Solution

The fourth proportional to 100,225.02, 138,310.40 and 54,905.78 is: 75,769.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,225.02 : 138,310.40 = 54,905.78 : x
  2. Step 2: Convert to fraction form
    100,225.02/138,310.40 = 54,905.78/x
  3. Step 3: Cross multiply
    100,225.02x = 138,310.40 × 54,905.78
  4. Step 4: Simplify right side
    100,225.02x = 7,594,040,394.11
  5. Step 5: Solve for x
    x = 7,594,040,394.11/100,225.02
  6. Step 6: Final answer
    x = 75,769.91

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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.