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Finding the Fourth Proportional to 162,092.80, 243,139.20 and 128,267.20

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Solution

The fourth proportional to 162,092.80, 243,139.20 and 128,267.20 is: 192,400.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,092.80 : 243,139.20 = 128,267.20 : x
  2. Step 2: Convert to fraction form
    162,092.80/243,139.20 = 128,267.20/x
  3. Step 3: Cross multiply
    162,092.80x = 243,139.20 × 128,267.20
  4. Step 4: Simplify right side
    162,092.80x = 31,186,784,394.24
  5. Step 5: Solve for x
    x = 31,186,784,394.24/162,092.80
  6. Step 6: Final answer
    x = 192,400.80

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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.