Home / 90,815.55-136,245.20-28,486.05

Finding the Fourth Proportional to 90,815.55, 136,245.20 and 28,486.05

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Solution

The fourth proportional to 90,815.55, 136,245.20 and 28,486.05 is: 42,735.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,815.55 : 136,245.20 = 28,486.05 : x
  2. Step 2: Convert to fraction form
    90,815.55/136,245.20 = 28,486.05/x
  3. Step 3: Cross multiply
    90,815.55x = 136,245.20 × 28,486.05
  4. Step 4: Simplify right side
    90,815.55x = 3,881,088,275.97
  5. Step 5: Solve for x
    x = 3,881,088,275.97/90,815.55
  6. Step 6: Final answer
    x = 42,735.94

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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.