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Finding the Fourth Proportional to 66,349.94, 99,540.62 and 28,916.70

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Solution

The fourth proportional to 66,349.94, 99,540.62 and 28,916.70 is: 43,381.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,349.94 : 99,540.62 = 28,916.70 : x
  2. Step 2: Convert to fraction form
    66,349.94/99,540.62 = 28,916.70/x
  3. Step 3: Cross multiply
    66,349.94x = 99,540.62 × 28,916.70
  4. Step 4: Simplify right side
    66,349.94x = 2,878,385,918.26
  5. Step 5: Solve for x
    x = 2,878,385,918.26/66,349.94
  6. Step 6: Final answer
    x = 43,381.90

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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.