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Finding the Fourth Proportional to 57,998.40, 87,127.20 and 55,636.80

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Solution

The fourth proportional to 57,998.40, 87,127.20 and 55,636.80 is: 83,579.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,998.40 : 87,127.20 = 55,636.80 : x
  2. Step 2: Convert to fraction form
    57,998.40/87,127.20 = 55,636.80/x
  3. Step 3: Cross multiply
    57,998.40x = 87,127.20 × 55,636.80
  4. Step 4: Simplify right side
    57,998.40x = 4,847,478,600.96
  5. Step 5: Solve for x
    x = 4,847,478,600.96/57,998.40
  6. Step 6: Final answer
    x = 83,579.52

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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.