Home / 57,639.20-86,416.80-38,872.64

Finding the Fourth Proportional to 57,639.20, 86,416.80 and 38,872.64

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Solution

The fourth proportional to 57,639.20, 86,416.80 and 38,872.64 is: 58,280.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,639.20 : 86,416.80 = 38,872.64 : x
  2. Step 2: Convert to fraction form
    57,639.20/86,416.80 = 38,872.64/x
  3. Step 3: Cross multiply
    57,639.20x = 86,416.80 × 38,872.64
  4. Step 4: Simplify right side
    57,639.20x = 3,359,249,156.35
  5. Step 5: Solve for x
    x = 3,359,249,156.35/57,639.20
  6. Step 6: Final answer
    x = 58,280.63

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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.