Home / 90,623.54-125,017.12-63,780.95

Finding the Fourth Proportional to 90,623.54, 125,017.12 and 63,780.95

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Solution

The fourth proportional to 90,623.54, 125,017.12 and 63,780.95 is: 87,987.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,623.54 : 125,017.12 = 63,780.95 : x
  2. Step 2: Convert to fraction form
    90,623.54/125,017.12 = 63,780.95/x
  3. Step 3: Cross multiply
    90,623.54x = 125,017.12 × 63,780.95
  4. Step 4: Simplify right side
    90,623.54x = 7,973,711,072.13
  5. Step 5: Solve for x
    x = 7,973,711,072.13/90,623.54
  6. Step 6: Final answer
    x = 87,987.19

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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.