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Finding the Fourth Proportional to 56,727.60, 85,100.40 and 19,291.20

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Solution

The fourth proportional to 56,727.60, 85,100.40 and 19,291.20 is: 28,939.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,727.60 : 85,100.40 = 19,291.20 : x
  2. Step 2: Convert to fraction form
    56,727.60/85,100.40 = 19,291.20/x
  3. Step 3: Cross multiply
    56,727.60x = 85,100.40 × 19,291.20
  4. Step 4: Simplify right side
    56,727.60x = 1,641,688,836.48
  5. Step 5: Solve for x
    x = 1,641,688,836.48/56,727.60
  6. Step 6: Final answer
    x = 28,939.86

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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.