Home / 100,715.77-138,988.68-54,775.84

Finding the Fourth Proportional to 100,715.77, 138,988.68 and 54,775.84

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Solution

The fourth proportional to 100,715.77, 138,988.68 and 54,775.84 is: 75,591.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,715.77 : 138,988.68 = 54,775.84 : x
  2. Step 2: Convert to fraction form
    100,715.77/138,988.68 = 54,775.84/x
  3. Step 3: Cross multiply
    100,715.77x = 138,988.68 × 54,775.84
  4. Step 4: Simplify right side
    100,715.77x = 7,613,221,697.49
  5. Step 5: Solve for x
    x = 7,613,221,697.49/100,715.77
  6. Step 6: Final answer
    x = 75,591.16

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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.