Home / 85,135.24-127,702.16-31,840.66

Finding the Fourth Proportional to 85,135.24, 127,702.16 and 31,840.66

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Solution

The fourth proportional to 85,135.24, 127,702.16 and 31,840.66 is: 47,760.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,135.24 : 127,702.16 = 31,840.66 : x
  2. Step 2: Convert to fraction form
    85,135.24/127,702.16 = 31,840.66/x
  3. Step 3: Cross multiply
    85,135.24x = 127,702.16 × 31,840.66
  4. Step 4: Simplify right side
    85,135.24x = 4,066,120,260.11
  5. Step 5: Solve for x
    x = 4,066,120,260.11/85,135.24
  6. Step 6: Final answer
    x = 47,760.72

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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.