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Finding the Fourth Proportional to 122,145.20, 183,217.80 and 84,820.40

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Solution

The fourth proportional to 122,145.20, 183,217.80 and 84,820.40 is: 127,230.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,145.20 : 183,217.80 = 84,820.40 : x
  2. Step 2: Convert to fraction form
    122,145.20/183,217.80 = 84,820.40/x
  3. Step 3: Cross multiply
    122,145.20x = 183,217.80 × 84,820.40
  4. Step 4: Simplify right side
    122,145.20x = 15,540,607,083.12
  5. Step 5: Solve for x
    x = 15,540,607,083.12/122,145.20
  6. Step 6: Final answer
    x = 127,230.60

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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.