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Finding the Fourth Proportional to 98,873, 136,463.70 and 77,320.04

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Solution

The fourth proportional to 98,873, 136,463.70 and 77,320.04 is: 106,716.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,873 : 136,463.70 = 77,320.04 : x
  2. Step 2: Convert to fraction form
    98,873/136,463.70 = 77,320.04/x
  3. Step 3: Cross multiply
    98,873x = 136,463.70 × 77,320.04
  4. Step 4: Simplify right side
    98,873x = 10,551,378,742.55
  5. Step 5: Solve for x
    x = 10,551,378,742.55/98,873
  6. Step 6: Final answer
    x = 106,716.48

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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.