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Finding the Fourth Proportional to 121,389.30, 182,127.15 and 117,069.30

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Solution

The fourth proportional to 121,389.30, 182,127.15 and 117,069.30 is: 175,645.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,389.30 : 182,127.15 = 117,069.30 : x
  2. Step 2: Convert to fraction form
    121,389.30/182,127.15 = 117,069.30/x
  3. Step 3: Cross multiply
    121,389.30x = 182,127.15 × 117,069.30
  4. Step 4: Simplify right side
    121,389.30x = 21,321,497,961.50
  5. Step 5: Solve for x
    x = 21,321,497,961.50/121,389.30
  6. Step 6: Final answer
    x = 175,645.61

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1.5x scale

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.