Home / 80,583.20-120,730.80-38,938.40

Finding the Fourth Proportional to 80,583.20, 120,730.80 and 38,938.40

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Solution

The fourth proportional to 80,583.20, 120,730.80 and 38,938.40 is: 58,338.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,583.20 : 120,730.80 = 38,938.40 : x
  2. Step 2: Convert to fraction form
    80,583.20/120,730.80 = 38,938.40/x
  3. Step 3: Cross multiply
    80,583.20x = 120,730.80 × 38,938.40
  4. Step 4: Simplify right side
    80,583.20x = 4,701,064,182.72
  5. Step 5: Solve for x
    x = 4,701,064,182.72/80,583.20
  6. Step 6: Final answer
    x = 58,338.02

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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.