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Finding the Fourth Proportional to 81,777.12, 122,619.28 and 28,444.48

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Solution

The fourth proportional to 81,777.12, 122,619.28 and 28,444.48 is: 42,650.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,777.12 : 122,619.28 = 28,444.48 : x
  2. Step 2: Convert to fraction form
    81,777.12/122,619.28 = 28,444.48/x
  3. Step 3: Cross multiply
    81,777.12x = 122,619.28 × 28,444.48
  4. Step 4: Simplify right side
    81,777.12x = 3,487,841,657.57
  5. Step 5: Solve for x
    x = 3,487,841,657.57/81,777.12
  6. Step 6: Final answer
    x = 42,650.58

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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.