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Finding the Fourth Proportional to 66,082.51, 99,134.13 and 21,699.17

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Solution

The fourth proportional to 66,082.51, 99,134.13 and 21,699.17 is: 32,552.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,082.51 : 99,134.13 = 21,699.17 : x
  2. Step 2: Convert to fraction form
    66,082.51/99,134.13 = 21,699.17/x
  3. Step 3: Cross multiply
    66,082.51x = 99,134.13 × 21,699.17
  4. Step 4: Simplify right side
    66,082.51x = 2,151,128,339.67
  5. Step 5: Solve for x
    x = 2,151,128,339.67/66,082.51
  6. Step 6: Final answer
    x = 32,552.16

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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.