Home / 100,512.18-138,706.83-55,800.18

Finding the Fourth Proportional to 100,512.18, 138,706.83 and 55,800.18

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Solution

The fourth proportional to 100,512.18, 138,706.83 and 55,800.18 is: 77,004.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,512.18 : 138,706.83 = 55,800.18 : x
  2. Step 2: Convert to fraction form
    100,512.18/138,706.83 = 55,800.18/x
  3. Step 3: Cross multiply
    100,512.18x = 138,706.83 × 55,800.18
  4. Step 4: Simplify right side
    100,512.18x = 7,739,866,081.23
  5. Step 5: Solve for x
    x = 7,739,866,081.23/100,512.18
  6. Step 6: Final answer
    x = 77,004.26

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1.5x scale

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.