Home / 90,657.45-135,953.78-31,495.05

Finding the Fourth Proportional to 90,657.45, 135,953.78 and 31,495.05

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Solution

The fourth proportional to 90,657.45, 135,953.78 and 31,495.05 is: 47,231.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,657.45 : 135,953.78 = 31,495.05 : x
  2. Step 2: Convert to fraction form
    90,657.45/135,953.78 = 31,495.05/x
  3. Step 3: Cross multiply
    90,657.45x = 135,953.78 × 31,495.05
  4. Step 4: Simplify right side
    90,657.45x = 4,281,870,941.31
  5. Step 5: Solve for x
    x = 4,281,870,941.31/90,657.45
  6. Step 6: Final answer
    x = 47,231.32

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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.