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Finding the Fourth Proportional to 56,001.60, 83,992.80 and 20,923.20

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Solution

The fourth proportional to 56,001.60, 83,992.80 and 20,923.20 is: 31,381.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,001.60 : 83,992.80 = 20,923.20 : x
  2. Step 2: Convert to fraction form
    56,001.60/83,992.80 = 20,923.20/x
  3. Step 3: Cross multiply
    56,001.60x = 83,992.80 × 20,923.20
  4. Step 4: Simplify right side
    56,001.60x = 1,757,398,152.96
  5. Step 5: Solve for x
    x = 1,757,398,152.96/56,001.60
  6. Step 6: Final answer
    x = 31,381.21

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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.