Home / 142,013.76-195,943.92-86,809.20

Finding the Fourth Proportional to 142,013.76, 195,943.92 and 86,809.20

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Solution

The fourth proportional to 142,013.76, 195,943.92 and 86,809.20 is: 119,775.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,013.76 : 195,943.92 = 86,809.20 : x
  2. Step 2: Convert to fraction form
    142,013.76/195,943.92 = 86,809.20/x
  3. Step 3: Cross multiply
    142,013.76x = 195,943.92 × 86,809.20
  4. Step 4: Simplify right side
    142,013.76x = 17,009,734,940.06
  5. Step 5: Solve for x
    x = 17,009,734,940.06/142,013.76
  6. Step 6: Final answer
    x = 119,775.26

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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.