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Finding the Fourth Proportional to 66,391.90, 99,605.58 and 28,954.99

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Solution

The fourth proportional to 66,391.90, 99,605.58 and 28,954.99 is: 43,440.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,391.90 : 99,605.58 = 28,954.99 : x
  2. Step 2: Convert to fraction form
    66,391.90/99,605.58 = 28,954.99/x
  3. Step 3: Cross multiply
    66,391.90x = 99,605.58 × 28,954.99
  4. Step 4: Simplify right side
    66,391.90x = 2,884,078,572.84
  5. Step 5: Solve for x
    x = 2,884,078,572.84/66,391.90
  6. Step 6: Final answer
    x = 43,440.22

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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.