Home / 138,931.10-191,725.11-75,268.89

Finding the Fourth Proportional to 138,931.10, 191,725.11 and 75,268.89

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Solution

The fourth proportional to 138,931.10, 191,725.11 and 75,268.89 is: 103,871.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,931.10 : 191,725.11 = 75,268.89 : x
  2. Step 2: Convert to fraction form
    138,931.10/191,725.11 = 75,268.89/x
  3. Step 3: Cross multiply
    138,931.10x = 191,725.11 × 75,268.89
  4. Step 4: Simplify right side
    138,931.10x = 14,430,936,214.83
  5. Step 5: Solve for x
    x = 14,430,936,214.83/138,931.10
  6. Step 6: Final answer
    x = 103,871.18

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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.