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Finding the Fourth Proportional to 112,816.80, 169,225.20 and 28,576.80

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Solution

The fourth proportional to 112,816.80, 169,225.20 and 28,576.80 is: 42,865.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,816.80 : 169,225.20 = 28,576.80 : x
  2. Step 2: Convert to fraction form
    112,816.80/169,225.20 = 28,576.80/x
  3. Step 3: Cross multiply
    112,816.80x = 169,225.20 × 28,576.80
  4. Step 4: Simplify right side
    112,816.80x = 4,835,914,695.36
  5. Step 5: Solve for x
    x = 4,835,914,695.36/112,816.80
  6. Step 6: Final answer
    x = 42,865.20

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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.