Home / 85,215.40-127,821.90-38,468.20

Finding the Fourth Proportional to 85,215.40, 127,821.90 and 38,468.20

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Solution

The fourth proportional to 85,215.40, 127,821.90 and 38,468.20 is: 57,701.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,215.40 : 127,821.90 = 38,468.20 : x
  2. Step 2: Convert to fraction form
    85,215.40/127,821.90 = 38,468.20/x
  3. Step 3: Cross multiply
    85,215.40x = 127,821.90 × 38,468.20
  4. Step 4: Simplify right side
    85,215.40x = 4,917,078,413.58
  5. Step 5: Solve for x
    x = 4,917,078,413.58/85,215.40
  6. Step 6: Final answer
    x = 57,701.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.