Home / 81,262.03-121,903.40-31,356.38

Finding the Fourth Proportional to 81,262.03, 121,903.40 and 31,356.38

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Solution

The fourth proportional to 81,262.03, 121,903.40 and 31,356.38 is: 47,038.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,262.03 : 121,903.40 = 31,356.38 : x
  2. Step 2: Convert to fraction form
    81,262.03/121,903.40 = 31,356.38/x
  3. Step 3: Cross multiply
    81,262.03x = 121,903.40 × 31,356.38
  4. Step 4: Simplify right side
    81,262.03x = 3,822,448,802.57
  5. Step 5: Solve for x
    x = 3,822,448,802.57/81,262.03
  6. Step 6: Final answer
    x = 47,038.56

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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.