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Finding the Fourth Proportional to 111,508, 153,881.12 and 61,210.24

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Solution

The fourth proportional to 111,508, 153,881.12 and 61,210.24 is: 84,470.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,508 : 153,881.12 = 61,210.24 : x
  2. Step 2: Convert to fraction form
    111,508/153,881.12 = 61,210.24/x
  3. Step 3: Cross multiply
    111,508x = 153,881.12 × 61,210.24
  4. Step 4: Simplify right side
    111,508x = 9,419,100,286.67
  5. Step 5: Solve for x
    x = 9,419,100,286.67/111,508
  6. Step 6: Final answer
    x = 84,470.18

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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.