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Finding the Fourth Proportional to 85,843.60, 128,656.05 and 62,442.70

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Solution

The fourth proportional to 85,843.60, 128,656.05 and 62,442.70 is: 93,584.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,843.60 : 128,656.05 = 62,442.70 : x
  2. Step 2: Convert to fraction form
    85,843.60/128,656.05 = 62,442.70/x
  3. Step 3: Cross multiply
    85,843.60x = 128,656.05 × 62,442.70
  4. Step 4: Simplify right side
    85,843.60x = 8,033,631,133.34
  5. Step 5: Solve for x
    x = 8,033,631,133.34/85,843.60
  6. Step 6: Final answer
    x = 93,584.51

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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.