Home / 90,631.30-135,971.44-64,501.90

Finding the Fourth Proportional to 90,631.30, 135,971.44 and 64,501.90

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Solution

The fourth proportional to 90,631.30, 135,971.44 and 64,501.90 is: 96,770.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,631.30 : 135,971.44 = 64,501.90 : x
  2. Step 2: Convert to fraction form
    90,631.30/135,971.44 = 64,501.90/x
  3. Step 3: Cross multiply
    90,631.30x = 135,971.44 × 64,501.90
  4. Step 4: Simplify right side
    90,631.30x = 8,770,416,225.74
  5. Step 5: Solve for x
    x = 8,770,416,225.74/90,631.30
  6. Step 6: Final answer
    x = 96,770.28

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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.