Home / 138,654.86-191,343.48-78,225.35

Finding the Fourth Proportional to 138,654.86, 191,343.48 and 78,225.35

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Solution

The fourth proportional to 138,654.86, 191,343.48 and 78,225.35 is: 107,950.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,654.86 : 191,343.48 = 78,225.35 : x
  2. Step 2: Convert to fraction form
    138,654.86/191,343.48 = 78,225.35/x
  3. Step 3: Cross multiply
    138,654.86x = 191,343.48 × 78,225.35
  4. Step 4: Simplify right side
    138,654.86x = 14,967,910,693.22
  5. Step 5: Solve for x
    x = 14,967,910,693.22/138,654.86
  6. Step 6: Final answer
    x = 107,950.86

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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.