Home / 154,900.20-213,762.36-86,907.78

Finding the Fourth Proportional to 154,900.20, 213,762.36 and 86,907.78

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Solution

The fourth proportional to 154,900.20, 213,762.36 and 86,907.78 is: 119,932.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,900.20 : 213,762.36 = 86,907.78 : x
  2. Step 2: Convert to fraction form
    154,900.20/213,762.36 = 86,907.78/x
  3. Step 3: Cross multiply
    154,900.20x = 213,762.36 × 86,907.78
  4. Step 4: Simplify right side
    154,900.20x = 18,577,612,155.16
  5. Step 5: Solve for x
    x = 18,577,612,155.16/154,900.20
  6. Step 6: Final answer
    x = 119,932.78

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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.