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Finding the Fourth Proportional to 85,292.99, 127,779.54 and 71,342.66

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Solution

The fourth proportional to 85,292.99, 127,779.54 and 71,342.66 is: 106,880.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,292.99 : 127,779.54 = 71,342.66 : x
  2. Step 2: Convert to fraction form
    85,292.99/127,779.54 = 71,342.66/x
  3. Step 3: Cross multiply
    85,292.99x = 127,779.54 × 71,342.66
  4. Step 4: Simplify right side
    85,292.99x = 9,116,131,638.28
  5. Step 5: Solve for x
    x = 9,116,131,638.28/85,292.99
  6. Step 6: Final answer
    x = 106,880.20

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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.