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Finding the Fourth Proportional to 121,286.16, 181,970.55 and 73,995.93

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Solution

The fourth proportional to 121,286.16, 181,970.55 and 73,995.93 is: 111,019.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,286.16 : 181,970.55 = 73,995.93 : x
  2. Step 2: Convert to fraction form
    121,286.16/181,970.55 = 73,995.93/x
  3. Step 3: Cross multiply
    121,286.16x = 181,970.55 × 73,995.93
  4. Step 4: Simplify right side
    121,286.16x = 13,465,080,079.86
  5. Step 5: Solve for x
    x = 13,465,080,079.86/121,286.16
  6. Step 6: Final answer
    x = 111,019.10

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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.