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Finding the Fourth Proportional to 55,920.96, 83,855.51 and 20,851.20

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Solution

The fourth proportional to 55,920.96, 83,855.51 and 20,851.20 is: 31,267.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,920.96 : 83,855.51 = 20,851.20 : x
  2. Step 2: Convert to fraction form
    55,920.96/83,855.51 = 20,851.20/x
  3. Step 3: Cross multiply
    55,920.96x = 83,855.51 × 20,851.20
  4. Step 4: Simplify right side
    55,920.96x = 1,748,487,590.83
  5. Step 5: Solve for x
    x = 1,748,487,590.83/55,920.96
  6. Step 6: Final answer
    x = 31,267.13

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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.