Home / 100,876.23-139,210.25-55,555.11

Finding the Fourth Proportional to 100,876.23, 139,210.25 and 55,555.11

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Solution

The fourth proportional to 100,876.23, 139,210.25 and 55,555.11 is: 76,666.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,876.23 : 139,210.25 = 55,555.11 : x
  2. Step 2: Convert to fraction form
    100,876.23/139,210.25 = 55,555.11/x
  3. Step 3: Cross multiply
    100,876.23x = 139,210.25 × 55,555.11
  4. Step 4: Simplify right side
    100,876.23x = 7,733,840,474.10
  5. Step 5: Solve for x
    x = 7,733,840,474.10/100,876.23
  6. Step 6: Final answer
    x = 76,666.63

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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.