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Finding the Fourth Proportional to 67,702.95, 101,570.64 and 20,955.82

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Solution

The fourth proportional to 67,702.95, 101,570.64 and 20,955.82 is: 31,438.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,702.95 : 101,570.64 = 20,955.82 : x
  2. Step 2: Convert to fraction form
    67,702.95/101,570.64 = 20,955.82/x
  3. Step 3: Cross multiply
    67,702.95x = 101,570.64 × 20,955.82
  4. Step 4: Simplify right side
    67,702.95x = 2,128,496,049.12
  5. Step 5: Solve for x
    x = 2,128,496,049.12/67,702.95
  6. Step 6: Final answer
    x = 31,438.75

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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.