Home / 138,868.77-191,638.48-75,206.55

Finding the Fourth Proportional to 138,868.77, 191,638.48 and 75,206.55

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Solution

The fourth proportional to 138,868.77, 191,638.48 and 75,206.55 is: 103,784.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,868.77 : 191,638.48 = 75,206.55 : x
  2. Step 2: Convert to fraction form
    138,868.77/191,638.48 = 75,206.55/x
  3. Step 3: Cross multiply
    138,868.77x = 191,638.48 × 75,206.55
  4. Step 4: Simplify right side
    138,868.77x = 14,412,468,552.01
  5. Step 5: Solve for x
    x = 14,412,468,552.01/138,868.77
  6. Step 6: Final answer
    x = 103,784.81

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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.