Home / 100,513.18-138,708.21-55,801.18

Finding the Fourth Proportional to 100,513.18, 138,708.21 and 55,801.18

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Solution

The fourth proportional to 100,513.18, 138,708.21 and 55,801.18 is: 77,005.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,513.18 : 138,708.21 = 55,801.18 : x
  2. Step 2: Convert to fraction form
    100,513.18/138,708.21 = 55,801.18/x
  3. Step 3: Cross multiply
    100,513.18x = 138,708.21 × 55,801.18
  4. Step 4: Simplify right side
    100,513.18x = 7,740,081,793.69
  5. Step 5: Solve for x
    x = 7,740,081,793.69/100,513.18
  6. Step 6: Final answer
    x = 77,005.64

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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.