Home / 140,137.50-193,396.05-78,904.77

Finding the Fourth Proportional to 140,137.50, 193,396.05 and 78,904.77

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Solution

The fourth proportional to 140,137.50, 193,396.05 and 78,904.77 is: 108,892.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,137.50 : 193,396.05 = 78,904.77 : x
  2. Step 2: Convert to fraction form
    140,137.50/193,396.05 = 78,904.77/x
  3. Step 3: Cross multiply
    140,137.50x = 193,396.05 × 78,904.77
  4. Step 4: Simplify right side
    140,137.50x = 15,259,870,844.16
  5. Step 5: Solve for x
    x = 15,259,870,844.16/140,137.50
  6. Step 6: Final answer
    x = 108,892.13

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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.