Home / 138,614.19-191,289.79-78,186.04

Finding the Fourth Proportional to 138,614.19, 191,289.79 and 78,186.04

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Solution

The fourth proportional to 138,614.19, 191,289.79 and 78,186.04 is: 107,897.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,614.19 : 191,289.79 = 78,186.04 : x
  2. Step 2: Convert to fraction form
    138,614.19/191,289.79 = 78,186.04/x
  3. Step 3: Cross multiply
    138,614.19x = 191,289.79 × 78,186.04
  4. Step 4: Simplify right side
    138,614.19x = 14,956,190,323.02
  5. Step 5: Solve for x
    x = 14,956,190,323.02/138,614.19
  6. Step 6: Final answer
    x = 107,897.97

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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.