Home / 85,555.20-128,340.04-31,534.64

Finding the Fourth Proportional to 85,555.20, 128,340.04 and 31,534.64

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Solution

The fourth proportional to 85,555.20, 128,340.04 and 31,534.64 is: 47,304.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,555.20 : 128,340.04 = 31,534.64 : x
  2. Step 2: Convert to fraction form
    85,555.20/128,340.04 = 31,534.64/x
  3. Step 3: Cross multiply
    85,555.20x = 128,340.04 × 31,534.64
  4. Step 4: Simplify right side
    85,555.20x = 4,047,156,958.99
  5. Step 5: Solve for x
    x = 4,047,156,958.99/85,555.20
  6. Step 6: Final answer
    x = 47,304.63

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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.