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Finding the Fourth Proportional to 56,615.60, 85,020.60 and 36,981.20

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Solution

The fourth proportional to 56,615.60, 85,020.60 and 36,981.20 is: 55,535.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,615.60 : 85,020.60 = 36,981.20 : x
  2. Step 2: Convert to fraction form
    56,615.60/85,020.60 = 36,981.20/x
  3. Step 3: Cross multiply
    56,615.60x = 85,020.60 × 36,981.20
  4. Step 4: Simplify right side
    56,615.60x = 3,144,163,812.72
  5. Step 5: Solve for x
    x = 3,144,163,812.72/56,615.60
  6. Step 6: Final answer
    x = 55,535.29

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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.