Home / 80,669.16-121,003.74-38,421.16

Finding the Fourth Proportional to 80,669.16, 121,003.74 and 38,421.16

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Solution

The fourth proportional to 80,669.16, 121,003.74 and 38,421.16 is: 57,631.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,669.16 : 121,003.74 = 38,421.16 : x
  2. Step 2: Convert to fraction form
    80,669.16/121,003.74 = 38,421.16/x
  3. Step 3: Cross multiply
    80,669.16x = 121,003.74 × 38,421.16
  4. Step 4: Simplify right side
    80,669.16x = 4,649,103,752.63
  5. Step 5: Solve for x
    x = 4,649,103,752.63/80,669.16
  6. Step 6: Final answer
    x = 57,631.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.