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Finding the Fourth Proportional to 66,428.94, 99,574.17 and 28,978.95

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Solution

The fourth proportional to 66,428.94, 99,574.17 and 28,978.95 is: 43,438.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,428.94 : 99,574.17 = 28,978.95 : x
  2. Step 2: Convert to fraction form
    66,428.94/99,574.17 = 28,978.95/x
  3. Step 3: Cross multiply
    66,428.94x = 99,574.17 × 28,978.95
  4. Step 4: Simplify right side
    66,428.94x = 2,885,554,893.72
  5. Step 5: Solve for x
    x = 2,885,554,893.72/66,428.94
  6. Step 6: Final answer
    x = 43,438.22

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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.