Home / 138,783.51-191,521.35-75,121.11

Finding the Fourth Proportional to 138,783.51, 191,521.35 and 75,121.11

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Solution

The fourth proportional to 138,783.51, 191,521.35 and 75,121.11 is: 103,667.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,783.51 : 191,521.35 = 75,121.11 : x
  2. Step 2: Convert to fraction form
    138,783.51/191,521.35 = 75,121.11/x
  3. Step 3: Cross multiply
    138,783.51x = 191,521.35 × 75,121.11
  4. Step 4: Simplify right side
    138,783.51x = 14,387,296,400.70
  5. Step 5: Solve for x
    x = 14,387,296,400.70/138,783.51
  6. Step 6: Final answer
    x = 103,667.19

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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.