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Finding the Fourth Proportional to 66,428.52, 99,657.30 and 22,061.40

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Solution

The fourth proportional to 66,428.52, 99,657.30 and 22,061.40 is: 33,096.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,428.52 : 99,657.30 = 22,061.40 : x
  2. Step 2: Convert to fraction form
    66,428.52/99,657.30 = 22,061.40/x
  3. Step 3: Cross multiply
    66,428.52x = 99,657.30 × 22,061.40
  4. Step 4: Simplify right side
    66,428.52x = 2,198,579,558.22
  5. Step 5: Solve for x
    x = 2,198,579,558.22/66,428.52
  6. Step 6: Final answer
    x = 33,096.92

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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.