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Finding the Fourth Proportional to 112,548.64, 168,881.68 and 81,639.04

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Solution

The fourth proportional to 112,548.64, 168,881.68 and 81,639.04 is: 122,501.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,548.64 : 168,881.68 = 81,639.04 : x
  2. Step 2: Convert to fraction form
    112,548.64/168,881.68 = 81,639.04/x
  3. Step 3: Cross multiply
    112,548.64x = 168,881.68 × 81,639.04
  4. Step 4: Simplify right side
    112,548.64x = 13,787,338,228.79
  5. Step 5: Solve for x
    x = 13,787,338,228.79/112,548.64
  6. Step 6: Final answer
    x = 122,501.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.