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Finding the Fourth Proportional to 57,218.90, 78,946.24 and 33,018.18

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Solution

The fourth proportional to 57,218.90, 78,946.24 and 33,018.18 is: 45,555.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,218.90 : 78,946.24 = 33,018.18 : x
  2. Step 2: Convert to fraction form
    57,218.90/78,946.24 = 33,018.18/x
  3. Step 3: Cross multiply
    57,218.90x = 78,946.24 × 33,018.18
  4. Step 4: Simplify right side
    57,218.90x = 2,606,661,245.19
  5. Step 5: Solve for x
    x = 2,606,661,245.19/57,218.90
  6. Step 6: Final answer
    x = 45,555.95

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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.