Home / 138,478.94-191,101.03-74,816.72

Finding the Fourth Proportional to 138,478.94, 191,101.03 and 74,816.72

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Solution

The fourth proportional to 138,478.94, 191,101.03 and 74,816.72 is: 103,247.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,478.94 : 191,101.03 = 74,816.72 : x
  2. Step 2: Convert to fraction form
    138,478.94/191,101.03 = 74,816.72/x
  3. Step 3: Cross multiply
    138,478.94x = 191,101.03 × 74,816.72
  4. Step 4: Simplify right side
    138,478.94x = 14,297,551,297.72
  5. Step 5: Solve for x
    x = 14,297,551,297.72/138,478.94
  6. Step 6: Final answer
    x = 103,247.12

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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.