Home / 80,912.16-121,420.08-39,336.48

Finding the Fourth Proportional to 80,912.16, 121,420.08 and 39,336.48

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Solution

The fourth proportional to 80,912.16, 121,420.08 and 39,336.48 is: 59,029.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,912.16 : 121,420.08 = 39,336.48 : x
  2. Step 2: Convert to fraction form
    80,912.16/121,420.08 = 39,336.48/x
  3. Step 3: Cross multiply
    80,912.16x = 121,420.08 × 39,336.48
  4. Step 4: Simplify right side
    80,912.16x = 4,776,238,548.52
  5. Step 5: Solve for x
    x = 4,776,238,548.52/80,912.16
  6. Step 6: Final answer
    x = 59,029.92

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1.5x scale

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.