Home / 138,622.86-191,302.31-78,181.65

Finding the Fourth Proportional to 138,622.86, 191,302.31 and 78,181.65

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Solution

The fourth proportional to 138,622.86, 191,302.31 and 78,181.65 is: 107,892.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,622.86 : 191,302.31 = 78,181.65 : x
  2. Step 2: Convert to fraction form
    138,622.86/191,302.31 = 78,181.65/x
  3. Step 3: Cross multiply
    138,622.86x = 191,302.31 × 78,181.65
  4. Step 4: Simplify right side
    138,622.86x = 14,956,330,440.07
  5. Step 5: Solve for x
    x = 14,956,330,440.07/138,622.86
  6. Step 6: Final answer
    x = 107,892.24

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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.