Home / 100,301.12-138,415.02-54,981.02

Finding the Fourth Proportional to 100,301.12, 138,415.02 and 54,981.02

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Solution

The fourth proportional to 100,301.12, 138,415.02 and 54,981.02 is: 75,873.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,301.12 : 138,415.02 = 54,981.02 : x
  2. Step 2: Convert to fraction form
    100,301.12/138,415.02 = 54,981.02/x
  3. Step 3: Cross multiply
    100,301.12x = 138,415.02 × 54,981.02
  4. Step 4: Simplify right side
    100,301.12x = 7,610,198,982.92
  5. Step 5: Solve for x
    x = 7,610,198,982.92/100,301.12
  6. Step 6: Final answer
    x = 75,873.52

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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.