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Finding the Fourth Proportional to 121,690.90, 182,288.48 and 99,281.44

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Solution

The fourth proportional to 121,690.90, 182,288.48 and 99,281.44 is: 148,719.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,690.90 : 182,288.48 = 99,281.44 : x
  2. Step 2: Convert to fraction form
    121,690.90/182,288.48 = 99,281.44/x
  3. Step 3: Cross multiply
    121,690.90x = 182,288.48 × 99,281.44
  4. Step 4: Simplify right side
    121,690.90x = 18,097,862,582.29
  5. Step 5: Solve for x
    x = 18,097,862,582.29/121,690.90
  6. Step 6: Final answer
    x = 148,719.94

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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.