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Finding the Fourth Proportional to 127,979.84, 191,879.40 and 43,699.52

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Solution

The fourth proportional to 127,979.84, 191,879.40 and 43,699.52 is: 65,518.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,979.84 : 191,879.40 = 43,699.52 : x
  2. Step 2: Convert to fraction form
    127,979.84/191,879.40 = 43,699.52/x
  3. Step 3: Cross multiply
    127,979.84x = 191,879.40 × 43,699.52
  4. Step 4: Simplify right side
    127,979.84x = 8,385,037,677.89
  5. Step 5: Solve for x
    x = 8,385,037,677.89/127,979.84
  6. Step 6: Final answer
    x = 65,518.43

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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.