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Finding the Fourth Proportional to 121,019.10, 181,565.10 and 86,027.10

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Solution

The fourth proportional to 121,019.10, 181,565.10 and 86,027.10 is: 129,066.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,019.10 : 181,565.10 = 86,027.10 : x
  2. Step 2: Convert to fraction form
    121,019.10/181,565.10 = 86,027.10/x
  3. Step 3: Cross multiply
    121,019.10x = 181,565.10 × 86,027.10
  4. Step 4: Simplify right side
    121,019.10x = 15,619,519,014.21
  5. Step 5: Solve for x
    x = 15,619,519,014.21/121,019.10
  6. Step 6: Final answer
    x = 129,066.56

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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.