Home / 100,521.39-138,714.08-55,205.34

Finding the Fourth Proportional to 100,521.39, 138,714.08 and 55,205.34

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Solution

The fourth proportional to 100,521.39, 138,714.08 and 55,205.34 is: 76,180.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,521.39 : 138,714.08 = 55,205.34 : x
  2. Step 2: Convert to fraction form
    100,521.39/138,714.08 = 55,205.34/x
  3. Step 3: Cross multiply
    100,521.39x = 138,714.08 × 55,205.34
  4. Step 4: Simplify right side
    100,521.39x = 7,657,757,949.19
  5. Step 5: Solve for x
    x = 7,657,757,949.19/100,521.39
  6. Step 6: Final answer
    x = 76,180.38

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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.