Home / 80,731.64-121,113.66-28,127

Finding the Fourth Proportional to 80,731.64, 121,113.66 and 28,127

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Solution

The fourth proportional to 80,731.64, 121,113.66 and 28,127 is: 42,196.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,731.64 : 121,113.66 = 28,127 : x
  2. Step 2: Convert to fraction form
    80,731.64/121,113.66 = 28,127/x
  3. Step 3: Cross multiply
    80,731.64x = 121,113.66 × 28,127
  4. Step 4: Simplify right side
    80,731.64x = 3,406,563,914.82
  5. Step 5: Solve for x
    x = 3,406,563,914.82/80,731.64
  6. Step 6: Final answer
    x = 42,196.14

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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.