Home / 138,869.10-191,638.17-75,206.34

Finding the Fourth Proportional to 138,869.10, 191,638.17 and 75,206.34

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Solution

The fourth proportional to 138,869.10, 191,638.17 and 75,206.34 is: 103,784.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,869.10 : 191,638.17 = 75,206.34 : x
  2. Step 2: Convert to fraction form
    138,869.10/191,638.17 = 75,206.34/x
  3. Step 3: Cross multiply
    138,869.10x = 191,638.17 × 75,206.34
  4. Step 4: Simplify right side
    138,869.10x = 14,412,405,370.00
  5. Step 5: Solve for x
    x = 14,412,405,370.00/138,869.10
  6. Step 6: Final answer
    x = 103,784.11

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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.