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Finding the Fourth Proportional to 70,858.32, 106,250.88 and 20,932.08

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Solution

The fourth proportional to 70,858.32, 106,250.88 and 20,932.08 is: 31,387.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,858.32 : 106,250.88 = 20,932.08 : x
  2. Step 2: Convert to fraction form
    70,858.32/106,250.88 = 20,932.08/x
  3. Step 3: Cross multiply
    70,858.32x = 106,250.88 × 20,932.08
  4. Step 4: Simplify right side
    70,858.32x = 2,224,051,920.23
  5. Step 5: Solve for x
    x = 2,224,051,920.23/70,858.32
  6. Step 6: Final answer
    x = 31,387.31

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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.