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Finding the Fourth Proportional to 122,014.80, 183,022.20 and 86,585.40

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Solution

The fourth proportional to 122,014.80, 183,022.20 and 86,585.40 is: 129,878.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,014.80 : 183,022.20 = 86,585.40 : x
  2. Step 2: Convert to fraction form
    122,014.80/183,022.20 = 86,585.40/x
  3. Step 3: Cross multiply
    122,014.80x = 183,022.20 × 86,585.40
  4. Step 4: Simplify right side
    122,014.80x = 15,847,050,395.88
  5. Step 5: Solve for x
    x = 15,847,050,395.88/122,014.80
  6. Step 6: Final answer
    x = 129,878.10

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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.