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Finding the Fourth Proportional to 108,053.20, 162,225.60 and 85,891.60

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Solution

The fourth proportional to 108,053.20, 162,225.60 and 85,891.60 is: 128,953.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,053.20 : 162,225.60 = 85,891.60 : x
  2. Step 2: Convert to fraction form
    108,053.20/162,225.60 = 85,891.60/x
  3. Step 3: Cross multiply
    108,053.20x = 162,225.60 × 85,891.60
  4. Step 4: Simplify right side
    108,053.20x = 13,933,816,344.96
  5. Step 5: Solve for x
    x = 13,933,816,344.96/108,053.20
  6. Step 6: Final answer
    x = 128,953.30

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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.