Home / 138,789.51-191,529.63-75,127.11

Finding the Fourth Proportional to 138,789.51, 191,529.63 and 75,127.11

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Solution

The fourth proportional to 138,789.51, 191,529.63 and 75,127.11 is: 103,675.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,789.51 : 191,529.63 = 75,127.11 : x
  2. Step 2: Convert to fraction form
    138,789.51/191,529.63 = 75,127.11/x
  3. Step 3: Cross multiply
    138,789.51x = 191,529.63 × 75,127.11
  4. Step 4: Simplify right side
    138,789.51x = 14,389,067,581.27
  5. Step 5: Solve for x
    x = 14,389,067,581.27/138,789.51
  6. Step 6: Final answer
    x = 103,675.47

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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.