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Finding the Fourth Proportional to 54,145.60, 81,218.40 and 51,812.80

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Solution

The fourth proportional to 54,145.60, 81,218.40 and 51,812.80 is: 77,719.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,145.60 : 81,218.40 = 51,812.80 : x
  2. Step 2: Convert to fraction form
    54,145.60/81,218.40 = 51,812.80/x
  3. Step 3: Cross multiply
    54,145.60x = 81,218.40 × 51,812.80
  4. Step 4: Simplify right side
    54,145.60x = 4,208,152,715.52
  5. Step 5: Solve for x
    x = 4,208,152,715.52/54,145.60
  6. Step 6: Final answer
    x = 77,719.20

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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.