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Finding the Fourth Proportional to 165,385.80, 248,078.70 and 112,897.80

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Solution

The fourth proportional to 165,385.80, 248,078.70 and 112,897.80 is: 169,346.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,385.80 : 248,078.70 = 112,897.80 : x
  2. Step 2: Convert to fraction form
    165,385.80/248,078.70 = 112,897.80/x
  3. Step 3: Cross multiply
    165,385.80x = 248,078.70 × 112,897.80
  4. Step 4: Simplify right side
    165,385.80x = 28,007,539,456.86
  5. Step 5: Solve for x
    x = 28,007,539,456.86/165,385.80
  6. Step 6: Final answer
    x = 169,346.70

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1.5x scale

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.