Home / 45,121.95-67,688.72-21,089.48

Finding the Fourth Proportional to 45,121.95, 67,688.72 and 21,089.48

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Solution

The fourth proportional to 45,121.95, 67,688.72 and 21,089.48 is: 31,636.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,121.95 : 67,688.72 = 21,089.48 : x
  2. Step 2: Convert to fraction form
    45,121.95/67,688.72 = 21,089.48/x
  3. Step 3: Cross multiply
    45,121.95x = 67,688.72 × 21,089.48
  4. Step 4: Simplify right side
    45,121.95x = 1,427,519,620.95
  5. Step 5: Solve for x
    x = 1,427,519,620.95/45,121.95
  6. Step 6: Final answer
    x = 31,636.92

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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.