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Finding the Fourth Proportional to 162,405.68, 243,679.73 and 77,078.17

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Solution

The fourth proportional to 162,405.68, 243,679.73 and 77,078.17 is: 115,651.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,405.68 : 243,679.73 = 77,078.17 : x
  2. Step 2: Convert to fraction form
    162,405.68/243,679.73 = 77,078.17/x
  3. Step 3: Cross multiply
    162,405.68x = 243,679.73 × 77,078.17
  4. Step 4: Simplify right side
    162,405.68x = 18,782,387,654.49
  5. Step 5: Solve for x
    x = 18,782,387,654.49/162,405.68
  6. Step 6: Final answer
    x = 115,651.05

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1.5x scale

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.