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Finding the Fourth Proportional to 86,121.93, 118,871.65 and 55,905.49

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Solution

The fourth proportional to 86,121.93, 118,871.65 and 55,905.49 is: 77,164.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,121.93 : 118,871.65 = 55,905.49 : x
  2. Step 2: Convert to fraction form
    86,121.93/118,871.65 = 55,905.49/x
  3. Step 3: Cross multiply
    86,121.93x = 118,871.65 × 55,905.49
  4. Step 4: Simplify right side
    86,121.93x = 6,645,578,058.83
  5. Step 5: Solve for x
    x = 6,645,578,058.83/86,121.93
  6. Step 6: Final answer
    x = 77,164.76

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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.