Home / 138,756.24-191,492.19-78,304.77

Finding the Fourth Proportional to 138,756.24, 191,492.19 and 78,304.77

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Solution

The fourth proportional to 138,756.24, 191,492.19 and 78,304.77 is: 108,065.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,756.24 : 191,492.19 = 78,304.77 : x
  2. Step 2: Convert to fraction form
    138,756.24/191,492.19 = 78,304.77/x
  3. Step 3: Cross multiply
    138,756.24x = 191,492.19 × 78,304.77
  4. Step 4: Simplify right side
    138,756.24x = 14,994,751,894.75
  5. Step 5: Solve for x
    x = 14,994,751,894.75/138,756.24
  6. Step 6: Final answer
    x = 108,065.42

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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.