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Finding the Fourth Proportional to 86,042.40, 118,738.80 and 49,740.96

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Solution

The fourth proportional to 86,042.40, 118,738.80 and 49,740.96 is: 68,642.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,042.40 : 118,738.80 = 49,740.96 : x
  2. Step 2: Convert to fraction form
    86,042.40/118,738.80 = 49,740.96/x
  3. Step 3: Cross multiply
    86,042.40x = 118,738.80 × 49,740.96
  4. Step 4: Simplify right side
    86,042.40x = 5,906,181,901.25
  5. Step 5: Solve for x
    x = 5,906,181,901.25/86,042.40
  6. Step 6: Final answer
    x = 68,642.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.