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Finding the Fourth Proportional to 91,702.95, 137,574.23 and 28,521.87

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Solution

The fourth proportional to 91,702.95, 137,574.23 and 28,521.87 is: 42,788.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,702.95 : 137,574.23 = 28,521.87 : x
  2. Step 2: Convert to fraction form
    91,702.95/137,574.23 = 28,521.87/x
  3. Step 3: Cross multiply
    91,702.95x = 137,574.23 × 28,521.87
  4. Step 4: Simplify right side
    91,702.95x = 3,923,874,160.80
  5. Step 5: Solve for x
    x = 3,923,874,160.80/91,702.95
  6. Step 6: Final answer
    x = 42,788.96

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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.