Home / 85,386.78-127,817.73-72,789.66

Finding the Fourth Proportional to 85,386.78, 127,817.73 and 72,789.66

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Solution

The fourth proportional to 85,386.78, 127,817.73 and 72,789.66 is: 108,960.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,386.78 : 127,817.73 = 72,789.66 : x
  2. Step 2: Convert to fraction form
    85,386.78/127,817.73 = 72,789.66/x
  3. Step 3: Cross multiply
    85,386.78x = 127,817.73 × 72,789.66
  4. Step 4: Simplify right side
    85,386.78x = 9,303,809,108.67
  5. Step 5: Solve for x
    x = 9,303,809,108.67/85,386.78
  6. Step 6: Final answer
    x = 108,960.77

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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.