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Finding the Fourth Proportional to 117,864, 162,652.32 and 64,872

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Solution

The fourth proportional to 117,864, 162,652.32 and 64,872 is: 89,523.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,864 : 162,652.32 = 64,872 : x
  2. Step 2: Convert to fraction form
    117,864/162,652.32 = 64,872/x
  3. Step 3: Cross multiply
    117,864x = 162,652.32 × 64,872
  4. Step 4: Simplify right side
    117,864x = 10,551,581,303.04
  5. Step 5: Solve for x
    x = 10,551,581,303.04/117,864
  6. Step 6: Final answer
    x = 89,523.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.