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Finding the Fourth Proportional to 66,657.88, 99,972.17 and 19,262.67

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Solution

The fourth proportional to 66,657.88, 99,972.17 and 19,262.67 is: 28,889.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,657.88 : 99,972.17 = 19,262.67 : x
  2. Step 2: Convert to fraction form
    66,657.88/99,972.17 = 19,262.67/x
  3. Step 3: Cross multiply
    66,657.88x = 99,972.17 × 19,262.67
  4. Step 4: Simplify right side
    66,657.88x = 1,925,730,699.57
  5. Step 5: Solve for x
    x = 1,925,730,699.57/66,657.88
  6. Step 6: Final answer
    x = 28,889.77

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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.