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Finding the Fourth Proportional to 111,643.02, 168,209.19 and 100,981.71

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Solution

The fourth proportional to 111,643.02, 168,209.19 and 100,981.71 is: 152,146.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,643.02 : 168,209.19 = 100,981.71 : x
  2. Step 2: Convert to fraction form
    111,643.02/168,209.19 = 100,981.71/x
  3. Step 3: Cross multiply
    111,643.02x = 168,209.19 × 100,981.71
  4. Step 4: Simplify right side
    111,643.02x = 16,986,051,643.91
  5. Step 5: Solve for x
    x = 16,986,051,643.91/111,643.02
  6. Step 6: Final answer
    x = 152,146.11

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.