Home / 100,200.04-138,278.14-54,879.93

Finding the Fourth Proportional to 100,200.04, 138,278.14 and 54,879.93

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Solution

The fourth proportional to 100,200.04, 138,278.14 and 54,879.93 is: 75,735.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,200.04 : 138,278.14 = 54,879.93 : x
  2. Step 2: Convert to fraction form
    100,200.04/138,278.14 = 54,879.93/x
  3. Step 3: Cross multiply
    100,200.04x = 138,278.14 × 54,879.93
  4. Step 4: Simplify right side
    100,200.04x = 7,588,694,506.53
  5. Step 5: Solve for x
    x = 7,588,694,506.53/100,200.04
  6. Step 6: Final answer
    x = 75,735.45

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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.