Home / 100,155.89-138,216.77-54,833.12

Finding the Fourth Proportional to 100,155.89, 138,216.77 and 54,833.12

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Solution

The fourth proportional to 100,155.89, 138,216.77 and 54,833.12 is: 75,670.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,155.89 : 138,216.77 = 54,833.12 : x
  2. Step 2: Convert to fraction form
    100,155.89/138,216.77 = 54,833.12/x
  3. Step 3: Cross multiply
    100,155.89x = 138,216.77 × 54,833.12
  4. Step 4: Simplify right side
    100,155.89x = 7,578,855,770.17
  5. Step 5: Solve for x
    x = 7,578,855,770.17/100,155.89
  6. Step 6: Final answer
    x = 75,670.60

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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.