Home / 80,729.64-121,110.66-28,125

Finding the Fourth Proportional to 80,729.64, 121,110.66 and 28,125

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Solution

The fourth proportional to 80,729.64, 121,110.66 and 28,125 is: 42,193.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,729.64 : 121,110.66 = 28,125 : x
  2. Step 2: Convert to fraction form
    80,729.64/121,110.66 = 28,125/x
  3. Step 3: Cross multiply
    80,729.64x = 121,110.66 × 28,125
  4. Step 4: Simplify right side
    80,729.64x = 3,406,237,312.50
  5. Step 5: Solve for x
    x = 3,406,237,312.50/80,729.64
  6. Step 6: Final answer
    x = 42,193.14

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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.