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Finding the Fourth Proportional to 137,315.20, 205,627.20 and 90,313.60

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Solution

The fourth proportional to 137,315.20, 205,627.20 and 90,313.60 is: 135,243.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,315.20 : 205,627.20 = 90,313.60 : x
  2. Step 2: Convert to fraction form
    137,315.20/205,627.20 = 90,313.60/x
  3. Step 3: Cross multiply
    137,315.20x = 205,627.20 × 90,313.60
  4. Step 4: Simplify right side
    137,315.20x = 18,570,932,689.92
  5. Step 5: Solve for x
    x = 18,570,932,689.92/137,315.20
  6. Step 6: Final answer
    x = 135,243.10

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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.