Home / 138,478.42-191,100.35-74,816.36

Finding the Fourth Proportional to 138,478.42, 191,100.35 and 74,816.36

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Solution

The fourth proportional to 138,478.42, 191,100.35 and 74,816.36 is: 103,246.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,478.42 : 191,100.35 = 74,816.36 : x
  2. Step 2: Convert to fraction form
    138,478.42/191,100.35 = 74,816.36/x
  3. Step 3: Cross multiply
    138,478.42x = 191,100.35 × 74,816.36
  4. Step 4: Simplify right side
    138,478.42x = 14,297,431,813.27
  5. Step 5: Solve for x
    x = 14,297,431,813.27/138,478.42
  6. Step 6: Final answer
    x = 103,246.64

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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.