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Finding the Fourth Proportional to 84,908.98, 127,355.65 and 28,742.67

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Solution

The fourth proportional to 84,908.98, 127,355.65 and 28,742.67 is: 43,111.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,908.98 : 127,355.65 = 28,742.67 : x
  2. Step 2: Convert to fraction form
    84,908.98/127,355.65 = 28,742.67/x
  3. Step 3: Cross multiply
    84,908.98x = 127,355.65 × 28,742.67
  4. Step 4: Simplify right side
    84,908.98x = 3,660,541,420.59
  5. Step 5: Solve for x
    x = 3,660,541,420.59/84,908.98
  6. Step 6: Final answer
    x = 43,111.36

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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.