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Finding the Fourth Proportional to 157,687.40, 236,458.20 and 68,895.20

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Solution

The fourth proportional to 157,687.40, 236,458.20 and 68,895.20 is: 103,310.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,687.40 : 236,458.20 = 68,895.20 : x
  2. Step 2: Convert to fraction form
    157,687.40/236,458.20 = 68,895.20/x
  3. Step 3: Cross multiply
    157,687.40x = 236,458.20 × 68,895.20
  4. Step 4: Simplify right side
    157,687.40x = 16,290,834,980.64
  5. Step 5: Solve for x
    x = 16,290,834,980.64/157,687.40
  6. Step 6: Final answer
    x = 103,310.95

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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.