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Finding the Fourth Proportional to 144,042.60, 216,063.90 and 128,879.40

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Solution

The fourth proportional to 144,042.60, 216,063.90 and 128,879.40 is: 193,319.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,042.60 : 216,063.90 = 128,879.40 : x
  2. Step 2: Convert to fraction form
    144,042.60/216,063.90 = 128,879.40/x
  3. Step 3: Cross multiply
    144,042.60x = 216,063.90 × 128,879.40
  4. Step 4: Simplify right side
    144,042.60x = 27,846,185,793.66
  5. Step 5: Solve for x
    x = 27,846,185,793.66/144,042.60
  6. Step 6: Final answer
    x = 193,319.10

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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.