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Finding the Fourth Proportional to 31,363.80, 47,045.70 and 29,905.80

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Solution

The fourth proportional to 31,363.80, 47,045.70 and 29,905.80 is: 44,858.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,363.80 : 47,045.70 = 29,905.80 : x
  2. Step 2: Convert to fraction form
    31,363.80/47,045.70 = 29,905.80/x
  3. Step 3: Cross multiply
    31,363.80x = 47,045.70 × 29,905.80
  4. Step 4: Simplify right side
    31,363.80x = 1,406,939,295.06
  5. Step 5: Solve for x
    x = 1,406,939,295.06/31,363.80
  6. Step 6: Final answer
    x = 44,858.70

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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.