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Finding the Fourth Proportional to 44,580.20, 66,840 and 21,209

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Solution

The fourth proportional to 44,580.20, 66,840 and 21,209 is: 31,799.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    44,580.20 : 66,840 = 21,209 : x
  2. Step 2: Convert to fraction form
    44,580.20/66,840 = 21,209/x
  3. Step 3: Cross multiply
    44,580.20x = 66,840 × 21,209
  4. Step 4: Simplify right side
    44,580.20x = 1,417,609,560
  5. Step 5: Solve for x
    x = 1,417,609,560/44,580.20
  6. Step 6: Final answer
    x = 31,799.08

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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.