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Finding the Fourth Proportional to 121,658.91, 181,363.80 and 119,741.64

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Solution

The fourth proportional to 121,658.91, 181,363.80 and 119,741.64 is: 178,505.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,658.91 : 181,363.80 = 119,741.64 : x
  2. Step 2: Convert to fraction form
    121,658.91/181,363.80 = 119,741.64/x
  3. Step 3: Cross multiply
    121,658.91x = 181,363.80 × 119,741.64
  4. Step 4: Simplify right side
    121,658.91x = 21,716,798,848.63
  5. Step 5: Solve for x
    x = 21,716,798,848.63/121,658.91
  6. Step 6: Final answer
    x = 178,505.62

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.