Home / 91,702.20-137,573.10-28,521.12

Finding the Fourth Proportional to 91,702.20, 137,573.10 and 28,521.12

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Solution

The fourth proportional to 91,702.20, 137,573.10 and 28,521.12 is: 42,787.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,702.20 : 137,573.10 = 28,521.12 : x
  2. Step 2: Convert to fraction form
    91,702.20/137,573.10 = 28,521.12/x
  3. Step 3: Cross multiply
    91,702.20x = 137,573.10 × 28,521.12
  4. Step 4: Simplify right side
    91,702.20x = 3,923,738,893.87
  5. Step 5: Solve for x
    x = 3,923,738,893.87/91,702.20
  6. Step 6: Final answer
    x = 42,787.84

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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.