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Finding the Fourth Proportional to 315,979.01, 474,305.85 and 136,153.18

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Solution

The fourth proportional to 315,979.01, 474,305.85 and 136,153.18 is: 204,375.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,979.01 : 474,305.85 = 136,153.18 : x
  2. Step 2: Convert to fraction form
    315,979.01/474,305.85 = 136,153.18/x
  3. Step 3: Cross multiply
    315,979.01x = 474,305.85 × 136,153.18
  4. Step 4: Simplify right side
    315,979.01x = 64,578,249,770.10
  5. Step 5: Solve for x
    x = 64,578,249,770.10/315,979.01
  6. Step 6: Final answer
    x = 204,375.13

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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.