Home / 135,502.07-186,987.89-78,143.81

Finding the Fourth Proportional to 135,502.07, 186,987.89 and 78,143.81

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Solution

The fourth proportional to 135,502.07, 186,987.89 and 78,143.81 is: 107,835.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,502.07 : 186,987.89 = 78,143.81 : x
  2. Step 2: Convert to fraction form
    135,502.07/186,987.89 = 78,143.81/x
  3. Step 3: Cross multiply
    135,502.07x = 186,987.89 × 78,143.81
  4. Step 4: Simplify right side
    135,502.07x = 14,611,944,822.80
  5. Step 5: Solve for x
    x = 14,611,944,822.80/135,502.07
  6. Step 6: Final answer
    x = 107,835.59

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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.