Home / 90,746.90-135,861.15-81,415.70

Finding the Fourth Proportional to 90,746.90, 135,861.15 and 81,415.70

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Solution

The fourth proportional to 90,746.90, 135,861.15 and 81,415.70 is: 121,891.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,746.90 : 135,861.15 = 81,415.70 : x
  2. Step 2: Convert to fraction form
    90,746.90/135,861.15 = 81,415.70/x
  3. Step 3: Cross multiply
    90,746.90x = 135,861.15 × 81,415.70
  4. Step 4: Simplify right side
    90,746.90x = 11,061,230,630.06
  5. Step 5: Solve for x
    x = 11,061,230,630.06/90,746.90
  6. Step 6: Final answer
    x = 121,891.00

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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.