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Finding the Fourth Proportional to 79,197.61, 118,782.07 and 31,810.79

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Solution

The fourth proportional to 79,197.61, 118,782.07 and 31,810.79 is: 47,710.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,197.61 : 118,782.07 = 31,810.79 : x
  2. Step 2: Convert to fraction form
    79,197.61/118,782.07 = 31,810.79/x
  3. Step 3: Cross multiply
    79,197.61x = 118,782.07 × 31,810.79
  4. Step 4: Simplify right side
    79,197.61x = 3,778,551,405.01
  5. Step 5: Solve for x
    x = 3,778,551,405.01/79,197.61
  6. Step 6: Final answer
    x = 47,710.42

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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.