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Finding the Fourth Proportional to 136,675.20, 205,012.80 and 99,350.40

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Solution

The fourth proportional to 136,675.20, 205,012.80 and 99,350.40 is: 149,025.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,675.20 : 205,012.80 = 99,350.40 : x
  2. Step 2: Convert to fraction form
    136,675.20/205,012.80 = 99,350.40/x
  3. Step 3: Cross multiply
    136,675.20x = 205,012.80 × 99,350.40
  4. Step 4: Simplify right side
    136,675.20x = 20,368,103,685.12
  5. Step 5: Solve for x
    x = 20,368,103,685.12/136,675.20
  6. Step 6: Final answer
    x = 149,025.60

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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.