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Finding the Fourth Proportional to 67,938, 93,755.88 and 38,130

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Solution

The fourth proportional to 67,938, 93,755.88 and 38,130 is: 52,620.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,938 : 93,755.88 = 38,130 : x
  2. Step 2: Convert to fraction form
    67,938/93,755.88 = 38,130/x
  3. Step 3: Cross multiply
    67,938x = 93,755.88 × 38,130
  4. Step 4: Simplify right side
    67,938x = 3,574,911,704.40
  5. Step 5: Solve for x
    x = 3,574,911,704.40/67,938
  6. Step 6: Final answer
    x = 52,620.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.