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Finding the Fourth Proportional to 52,698.20, 72,721.80 and 28,825.07

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Solution

The fourth proportional to 52,698.20, 72,721.80 and 28,825.07 is: 39,777.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,698.20 : 72,721.80 = 28,825.07 : x
  2. Step 2: Convert to fraction form
    52,698.20/72,721.80 = 28,825.07/x
  3. Step 3: Cross multiply
    52,698.20x = 72,721.80 × 28,825.07
  4. Step 4: Simplify right side
    52,698.20x = 2,096,210,611.92
  5. Step 5: Solve for x
    x = 2,096,210,611.92/52,698.20
  6. Step 6: Final answer
    x = 39,777.65

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1.5x scale

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.