Home / 154,961.73-213,830.75-86,986.18

Finding the Fourth Proportional to 154,961.73, 213,830.75 and 86,986.18

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Solution

The fourth proportional to 154,961.73, 213,830.75 and 86,986.18 is: 120,031.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,961.73 : 213,830.75 = 86,986.18 : x
  2. Step 2: Convert to fraction form
    154,961.73/213,830.75 = 86,986.18/x
  3. Step 3: Cross multiply
    154,961.73x = 213,830.75 × 86,986.18
  4. Step 4: Simplify right side
    154,961.73x = 18,600,319,674.10
  5. Step 5: Solve for x
    x = 18,600,319,674.10/154,961.73
  6. Step 6: Final answer
    x = 120,031.70

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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.