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Finding the Fourth Proportional to 92,699.88, 139,013.79 and 31,898.55

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Solution

The fourth proportional to 92,699.88, 139,013.79 and 31,898.55 is: 47,835.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,699.88 : 139,013.79 = 31,898.55 : x
  2. Step 2: Convert to fraction form
    92,699.88/139,013.79 = 31,898.55/x
  3. Step 3: Cross multiply
    92,699.88x = 139,013.79 × 31,898.55
  4. Step 4: Simplify right side
    92,699.88x = 4,434,338,331.00
  5. Step 5: Solve for x
    x = 4,434,338,331.00/92,699.88
  6. Step 6: Final answer
    x = 47,835.43

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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.