Home / 56,111.28-77,433.40-30,960.80

Finding the Fourth Proportional to 56,111.28, 77,433.40 and 30,960.80

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Solution

The fourth proportional to 56,111.28, 77,433.40 and 30,960.80 is: 42,725.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,111.28 : 77,433.40 = 30,960.80 : x
  2. Step 2: Convert to fraction form
    56,111.28/77,433.40 = 30,960.80/x
  3. Step 3: Cross multiply
    56,111.28x = 77,433.40 × 30,960.80
  4. Step 4: Simplify right side
    56,111.28x = 2,397,400,010.72
  5. Step 5: Solve for x
    x = 2,397,400,010.72/56,111.28
  6. Step 6: Final answer
    x = 42,725.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.