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Finding the Fourth Proportional to 79,866.83, 119,800.13 and 20,702.55

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Solution

The fourth proportional to 79,866.83, 119,800.13 and 20,702.55 is: 31,053.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,866.83 : 119,800.13 = 20,702.55 : x
  2. Step 2: Convert to fraction form
    79,866.83/119,800.13 = 20,702.55/x
  3. Step 3: Cross multiply
    79,866.83x = 119,800.13 × 20,702.55
  4. Step 4: Simplify right side
    79,866.83x = 2,480,168,077.82
  5. Step 5: Solve for x
    x = 2,480,168,077.82/79,866.83
  6. Step 6: Final answer
    x = 31,053.80

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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.