Home / 100,553.12-138,648.30-64,205.18

Finding the Fourth Proportional to 100,553.12, 138,648.30 and 64,205.18

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Solution

The fourth proportional to 100,553.12, 138,648.30 and 64,205.18 is: 88,529.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,553.12 : 138,648.30 = 64,205.18 : x
  2. Step 2: Convert to fraction form
    100,553.12/138,648.30 = 64,205.18/x
  3. Step 3: Cross multiply
    100,553.12x = 138,648.30 × 64,205.18
  4. Step 4: Simplify right side
    100,553.12x = 8,901,939,058.19
  5. Step 5: Solve for x
    x = 8,901,939,058.19/100,553.12
  6. Step 6: Final answer
    x = 88,529.72

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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.