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Finding the Fourth Proportional to 112,402.80, 168,496.20 and 64,969.20

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Solution

The fourth proportional to 112,402.80, 168,496.20 and 64,969.20 is: 97,391.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,402.80 : 168,496.20 = 64,969.20 : x
  2. Step 2: Convert to fraction form
    112,402.80/168,496.20 = 64,969.20/x
  3. Step 3: Cross multiply
    112,402.80x = 168,496.20 × 64,969.20
  4. Step 4: Simplify right side
    112,402.80x = 10,947,063,317.04
  5. Step 5: Solve for x
    x = 10,947,063,317.04/112,402.80
  6. Step 6: Final answer
    x = 97,391.38

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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.