Home / 100,220.64-138,241.92-64,457.28

Finding the Fourth Proportional to 100,220.64, 138,241.92 and 64,457.28

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Solution

The fourth proportional to 100,220.64, 138,241.92 and 64,457.28 is: 88,910.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,220.64 : 138,241.92 = 64,457.28 : x
  2. Step 2: Convert to fraction form
    100,220.64/138,241.92 = 64,457.28/x
  3. Step 3: Cross multiply
    100,220.64x = 138,241.92 × 64,457.28
  4. Step 4: Simplify right side
    100,220.64x = 8,910,698,145.18
  5. Step 5: Solve for x
    x = 8,910,698,145.18/100,220.64
  6. Step 6: Final answer
    x = 88,910.81

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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.