Home / 100,155.42-138,214.80-54,833.76

Finding the Fourth Proportional to 100,155.42, 138,214.80 and 54,833.76

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Solution

The fourth proportional to 100,155.42, 138,214.80 and 54,833.76 is: 75,670.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,155.42 : 138,214.80 = 54,833.76 : x
  2. Step 2: Convert to fraction form
    100,155.42/138,214.80 = 54,833.76/x
  3. Step 3: Cross multiply
    100,155.42x = 138,214.80 × 54,833.76
  4. Step 4: Simplify right side
    100,155.42x = 7,578,837,171.65
  5. Step 5: Solve for x
    x = 7,578,837,171.65/100,155.42
  6. Step 6: Final answer
    x = 75,670.76

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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.