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Finding the Fourth Proportional to 66,389.40, 99,601.83 and 28,952.49

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Solution

The fourth proportional to 66,389.40, 99,601.83 and 28,952.49 is: 43,436.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,389.40 : 99,601.83 = 28,952.49 : x
  2. Step 2: Convert to fraction form
    66,389.40/99,601.83 = 28,952.49/x
  3. Step 3: Cross multiply
    66,389.40x = 99,601.83 × 28,952.49
  4. Step 4: Simplify right side
    66,389.40x = 2,883,720,987.06
  5. Step 5: Solve for x
    x = 2,883,720,987.06/66,389.40
  6. Step 6: Final answer
    x = 43,436.47

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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.