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Finding the Fourth Proportional to 70,332.91, 105,499.40 and 30,890.36

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Solution

The fourth proportional to 70,332.91, 105,499.40 and 30,890.36 is: 46,335.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,332.91 : 105,499.40 = 30,890.36 : x
  2. Step 2: Convert to fraction form
    70,332.91/105,499.40 = 30,890.36/x
  3. Step 3: Cross multiply
    70,332.91x = 105,499.40 × 30,890.36
  4. Step 4: Simplify right side
    70,332.91x = 3,258,914,555.08
  5. Step 5: Solve for x
    x = 3,258,914,555.08/70,332.91
  6. Step 6: Final answer
    x = 46,335.56

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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.