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Finding the Fourth Proportional to 162,402.80, 243,604.20 and 112,539.20

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Solution

The fourth proportional to 162,402.80, 243,604.20 and 112,539.20 is: 168,808.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,402.80 : 243,604.20 = 112,539.20 : x
  2. Step 2: Convert to fraction form
    162,402.80/243,604.20 = 112,539.20/x
  3. Step 3: Cross multiply
    162,402.80x = 243,604.20 × 112,539.20
  4. Step 4: Simplify right side
    162,402.80x = 27,415,021,784.64
  5. Step 5: Solve for x
    x = 27,415,021,784.64/162,402.80
  6. Step 6: Final answer
    x = 168,808.80

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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.