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Finding the Fourth Proportional to 66,428.31, 99,700.03 and 34,860.68

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Solution

The fourth proportional to 66,428.31, 99,700.03 and 34,860.68 is: 52,321.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,428.31 : 99,700.03 = 34,860.68 : x
  2. Step 2: Convert to fraction form
    66,428.31/99,700.03 = 34,860.68/x
  3. Step 3: Cross multiply
    66,428.31x = 99,700.03 × 34,860.68
  4. Step 4: Simplify right side
    66,428.31x = 3,475,610,343.32
  5. Step 5: Solve for x
    x = 3,475,610,343.32/66,428.31
  6. Step 6: Final answer
    x = 52,321.22

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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.