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Finding the Fourth Proportional to 69,946.80, 104,920.20 and 28,393.80

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Solution

The fourth proportional to 69,946.80, 104,920.20 and 28,393.80 is: 42,590.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,946.80 : 104,920.20 = 28,393.80 : x
  2. Step 2: Convert to fraction form
    69,946.80/104,920.20 = 28,393.80/x
  3. Step 3: Cross multiply
    69,946.80x = 104,920.20 × 28,393.80
  4. Step 4: Simplify right side
    69,946.80x = 2,979,083,174.76
  5. Step 5: Solve for x
    x = 2,979,083,174.76/69,946.80
  6. Step 6: Final answer
    x = 42,590.70

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1.5x scale

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.