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Finding the Fourth Proportional to 61,391.76, 92,088.90 and 19,270.98

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Solution

The fourth proportional to 61,391.76, 92,088.90 and 19,270.98 is: 28,906.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,391.76 : 92,088.90 = 19,270.98 : x
  2. Step 2: Convert to fraction form
    61,391.76/92,088.90 = 19,270.98/x
  3. Step 3: Cross multiply
    61,391.76x = 92,088.90 × 19,270.98
  4. Step 4: Simplify right side
    61,391.76x = 1,774,643,350.12
  5. Step 5: Solve for x
    x = 1,774,643,350.12/61,391.76
  6. Step 6: Final answer
    x = 28,906.87

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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.