Home / 99,997.28-138,109.68-68,110.88

Finding the Fourth Proportional to 99,997.28, 138,109.68 and 68,110.88

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Solution

The fourth proportional to 99,997.28, 138,109.68 and 68,110.88 is: 94,070.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,997.28 : 138,109.68 = 68,110.88 : x
  2. Step 2: Convert to fraction form
    99,997.28/138,109.68 = 68,110.88/x
  3. Step 3: Cross multiply
    99,997.28x = 138,109.68 × 68,110.88
  4. Step 4: Simplify right side
    99,997.28x = 9,406,771,841.32
  5. Step 5: Solve for x
    x = 9,406,771,841.32/99,997.28
  6. Step 6: Final answer
    x = 94,070.28

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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.