Home / 158,985.20-219,400.77-86,388.78

Finding the Fourth Proportional to 158,985.20, 219,400.77 and 86,388.78

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Solution

The fourth proportional to 158,985.20, 219,400.77 and 86,388.78 is: 119,217.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,985.20 : 219,400.77 = 86,388.78 : x
  2. Step 2: Convert to fraction form
    158,985.20/219,400.77 = 86,388.78/x
  3. Step 3: Cross multiply
    158,985.20x = 219,400.77 × 86,388.78
  4. Step 4: Simplify right side
    158,985.20x = 18,953,764,851.36
  5. Step 5: Solve for x
    x = 18,953,764,851.36/158,985.20
  6. Step 6: Final answer
    x = 119,217.17

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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.