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Finding the Fourth Proportional to 138,576.56, 191,235.06 and 74,914.20

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Solution

The fourth proportional to 138,576.56, 191,235.06 and 74,914.20 is: 103,381.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,576.56 : 191,235.06 = 74,914.20 : x
  2. Step 2: Convert to fraction form
    138,576.56/191,235.06 = 74,914.20/x
  3. Step 3: Cross multiply
    138,576.56x = 191,235.06 × 74,914.20
  4. Step 4: Simplify right side
    138,576.56x = 14,326,221,531.85
  5. Step 5: Solve for x
    x = 14,326,221,531.85/138,576.56
  6. Step 6: Final answer
    x = 103,381.28

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1.5x scale

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.