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Finding the Fourth Proportional to 56,697.69, 78,242.88 and 31,205.90

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Solution

The fourth proportional to 56,697.69, 78,242.88 and 31,205.90 is: 43,064.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,697.69 : 78,242.88 = 31,205.90 : x
  2. Step 2: Convert to fraction form
    56,697.69/78,242.88 = 31,205.90/x
  3. Step 3: Cross multiply
    56,697.69x = 78,242.88 × 31,205.90
  4. Step 4: Simplify right side
    56,697.69x = 2,441,639,801.62
  5. Step 5: Solve for x
    x = 2,441,639,801.62/56,697.69
  6. Step 6: Final answer
    x = 43,064.18

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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.