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Finding the Fourth Proportional to 90,662.79, 125,112.37 and 50,376.65

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Solution

The fourth proportional to 90,662.79, 125,112.37 and 50,376.65 is: 69,518.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,662.79 : 125,112.37 = 50,376.65 : x
  2. Step 2: Convert to fraction form
    90,662.79/125,112.37 = 50,376.65/x
  3. Step 3: Cross multiply
    90,662.79x = 125,112.37 × 50,376.65
  4. Step 4: Simplify right side
    90,662.79x = 6,302,742,449.91
  5. Step 5: Solve for x
    x = 6,302,742,449.91/90,662.79
  6. Step 6: Final answer
    x = 69,518.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.