Home / 78,068.91-117,103.73-18,904.49

Finding the Fourth Proportional to 78,068.91, 117,103.73 and 18,904.49

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Solution

The fourth proportional to 78,068.91, 117,103.73 and 18,904.49 is: 28,356.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,068.91 : 117,103.73 = 18,904.49 : x
  2. Step 2: Convert to fraction form
    78,068.91/117,103.73 = 18,904.49/x
  3. Step 3: Cross multiply
    78,068.91x = 117,103.73 × 18,904.49
  4. Step 4: Simplify right side
    78,068.91x = 2,213,786,051.85
  5. Step 5: Solve for x
    x = 2,213,786,051.85/78,068.91
  6. Step 6: Final answer
    x = 28,356.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.