Home / 64,649.12-89,119.44-39,481.76

Finding the Fourth Proportional to 64,649.12, 89,119.44 and 39,481.76

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Solution

The fourth proportional to 64,649.12, 89,119.44 and 39,481.76 is: 54,425.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,649.12 : 89,119.44 = 39,481.76 : x
  2. Step 2: Convert to fraction form
    64,649.12/89,119.44 = 39,481.76/x
  3. Step 3: Cross multiply
    64,649.12x = 89,119.44 × 39,481.76
  4. Step 4: Simplify right side
    64,649.12x = 3,518,592,341.41
  5. Step 5: Solve for x
    x = 3,518,592,341.41/64,649.12
  6. Step 6: Final answer
    x = 54,425.99

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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.