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Finding the Fourth Proportional to 86,888, 130,333.28 and 21,224

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Solution

The fourth proportional to 86,888, 130,333.28 and 21,224 is: 31,836.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,888 : 130,333.28 = 21,224 : x
  2. Step 2: Convert to fraction form
    86,888/130,333.28 = 21,224/x
  3. Step 3: Cross multiply
    86,888x = 130,333.28 × 21,224
  4. Step 4: Simplify right side
    86,888x = 2,766,193,534.72
  5. Step 5: Solve for x
    x = 2,766,193,534.72/86,888
  6. Step 6: Final answer
    x = 31,836.31

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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.