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Finding the Fourth Proportional to 101,888.64, 152,634.15 and 66,721.68

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Solution

The fourth proportional to 101,888.64, 152,634.15 and 66,721.68 is: 99,952.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,888.64 : 152,634.15 = 66,721.68 : x
  2. Step 2: Convert to fraction form
    101,888.64/152,634.15 = 66,721.68/x
  3. Step 3: Cross multiply
    101,888.64x = 152,634.15 × 66,721.68
  4. Step 4: Simplify right side
    101,888.64x = 10,184,006,913.37
  5. Step 5: Solve for x
    x = 10,184,006,913.37/101,888.64
  6. Step 6: Final answer
    x = 99,952.33

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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.