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Finding the Fourth Proportional to 53,289.60, 79,977.60 and 51,561.60

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Solution

The fourth proportional to 53,289.60, 79,977.60 and 51,561.60 is: 77,384.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,289.60 : 79,977.60 = 51,561.60 : x
  2. Step 2: Convert to fraction form
    53,289.60/79,977.60 = 51,561.60/x
  3. Step 3: Cross multiply
    53,289.60x = 79,977.60 × 51,561.60
  4. Step 4: Simplify right side
    53,289.60x = 4,123,773,020.16
  5. Step 5: Solve for x
    x = 4,123,773,020.16/53,289.60
  6. Step 6: Final answer
    x = 77,384.20

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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.