Home / 138,985.34-191,799.78-75,323.12

Finding the Fourth Proportional to 138,985.34, 191,799.78 and 75,323.12

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Solution

The fourth proportional to 138,985.34, 191,799.78 and 75,323.12 is: 103,945.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,985.34 : 191,799.78 = 75,323.12 : x
  2. Step 2: Convert to fraction form
    138,985.34/191,799.78 = 75,323.12/x
  3. Step 3: Cross multiply
    138,985.34x = 191,799.78 × 75,323.12
  4. Step 4: Simplify right side
    138,985.34x = 14,446,957,844.91
  5. Step 5: Solve for x
    x = 14,446,957,844.91/138,985.34
  6. Step 6: Final answer
    x = 103,945.91

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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.