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Finding the Fourth Proportional to 169,790.72, 253,439.68 and 157,280

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Solution

The fourth proportional to 169,790.72, 253,439.68 and 157,280 is: 234,765.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,790.72 : 253,439.68 = 157,280 : x
  2. Step 2: Convert to fraction form
    169,790.72/253,439.68 = 157,280/x
  3. Step 3: Cross multiply
    169,790.72x = 253,439.68 × 157,280
  4. Step 4: Simplify right side
    169,790.72x = 39,860,992,870.40
  5. Step 5: Solve for x
    x = 39,860,992,870.40/169,790.72
  6. Step 6: Final answer
    x = 234,765.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.