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Finding the Fourth Proportional to 57,998.40, 87,127.20 and 56,443.20

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Solution

The fourth proportional to 57,998.40, 87,127.20 and 56,443.20 is: 84,790.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,998.40 : 87,127.20 = 56,443.20 : x
  2. Step 2: Convert to fraction form
    57,998.40/87,127.20 = 56,443.20/x
  3. Step 3: Cross multiply
    57,998.40x = 87,127.20 × 56,443.20
  4. Step 4: Simplify right side
    57,998.40x = 4,917,737,975.04
  5. Step 5: Solve for x
    x = 4,917,737,975.04/57,998.40
  6. Step 6: Final answer
    x = 84,790.92

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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.