Home / 138,928.48-191,721.50-75,266.28

Finding the Fourth Proportional to 138,928.48, 191,721.50 and 75,266.28

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Solution

The fourth proportional to 138,928.48, 191,721.50 and 75,266.28 is: 103,867.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,928.48 : 191,721.50 = 75,266.28 : x
  2. Step 2: Convert to fraction form
    138,928.48/191,721.50 = 75,266.28/x
  3. Step 3: Cross multiply
    138,928.48x = 191,721.50 × 75,266.28
  4. Step 4: Simplify right side
    138,928.48x = 14,430,163,146.86
  5. Step 5: Solve for x
    x = 14,430,163,146.86/138,928.48
  6. Step 6: Final answer
    x = 103,867.57

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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.