Home / 112,721.78-155,556.06-62,420.78

Finding the Fourth Proportional to 112,721.78, 155,556.06 and 62,420.78

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Solution

The fourth proportional to 112,721.78, 155,556.06 and 62,420.78 is: 86,140.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,721.78 : 155,556.06 = 62,420.78 : x
  2. Step 2: Convert to fraction form
    112,721.78/155,556.06 = 62,420.78/x
  3. Step 3: Cross multiply
    112,721.78x = 155,556.06 × 62,420.78
  4. Step 4: Simplify right side
    112,721.78x = 9,709,930,598.93
  5. Step 5: Solve for x
    x = 9,709,930,598.93/112,721.78
  6. Step 6: Final answer
    x = 86,140.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.