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Finding the Fourth Proportional to 84,867.60, 127,315.14 and 28,711.11

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Solution

The fourth proportional to 84,867.60, 127,315.14 and 28,711.11 is: 43,071.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,867.60 : 127,315.14 = 28,711.11 : x
  2. Step 2: Convert to fraction form
    84,867.60/127,315.14 = 28,711.11/x
  3. Step 3: Cross multiply
    84,867.60x = 127,315.14 × 28,711.11
  4. Step 4: Simplify right side
    84,867.60x = 3,655,358,989.21
  5. Step 5: Solve for x
    x = 3,655,358,989.21/84,867.60
  6. Step 6: Final answer
    x = 43,071.31

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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.