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Finding the Fourth Proportional to 121,186.55, 181,695.48 and 53,681.93

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Solution

The fourth proportional to 121,186.55, 181,695.48 and 53,681.93 is: 80,485.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,186.55 : 181,695.48 = 53,681.93 : x
  2. Step 2: Convert to fraction form
    121,186.55/181,695.48 = 53,681.93/x
  3. Step 3: Cross multiply
    121,186.55x = 181,695.48 × 53,681.93
  4. Step 4: Simplify right side
    121,186.55x = 9,753,764,038.68
  5. Step 5: Solve for x
    x = 9,753,764,038.68/121,186.55
  6. Step 6: Final answer
    x = 80,485.53

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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.