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Finding the Fourth Proportional to 188,690.65, 283,167.20 and 121,965.28

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Solution

The fourth proportional to 188,690.65, 283,167.20 and 121,965.28 is: 183,032.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,690.65 : 283,167.20 = 121,965.28 : x
  2. Step 2: Convert to fraction form
    188,690.65/283,167.20 = 121,965.28/x
  3. Step 3: Cross multiply
    188,690.65x = 283,167.20 × 121,965.28
  4. Step 4: Simplify right side
    188,690.65x = 34,536,567,036.32
  5. Step 5: Solve for x
    x = 34,536,567,036.32/188,690.65
  6. Step 6: Final answer
    x = 183,032.74

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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.