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Finding the Fourth Proportional to 60,969.40, 91,387.19 and 31,388.81

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Solution

The fourth proportional to 60,969.40, 91,387.19 and 31,388.81 is: 47,048.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,969.40 : 91,387.19 = 31,388.81 : x
  2. Step 2: Convert to fraction form
    60,969.40/91,387.19 = 31,388.81/x
  3. Step 3: Cross multiply
    60,969.40x = 91,387.19 × 31,388.81
  4. Step 4: Simplify right side
    60,969.40x = 2,868,534,764.88
  5. Step 5: Solve for x
    x = 2,868,534,764.88/60,969.40
  6. Step 6: Final answer
    x = 47,048.76

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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.