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Finding the Fourth Proportional to 90,840.40, 136,260.60 and 80,731.60

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Solution

The fourth proportional to 90,840.40, 136,260.60 and 80,731.60 is: 121,097.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,840.40 : 136,260.60 = 80,731.60 : x
  2. Step 2: Convert to fraction form
    90,840.40/136,260.60 = 80,731.60/x
  3. Step 3: Cross multiply
    90,840.40x = 136,260.60 × 80,731.60
  4. Step 4: Simplify right side
    90,840.40x = 11,000,536,254.96
  5. Step 5: Solve for x
    x = 11,000,536,254.96/90,840.40
  6. Step 6: Final answer
    x = 121,097.40

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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.