Home / 72,756.48-100,403.22-40,490.55

Finding the Fourth Proportional to 72,756.48, 100,403.22 and 40,490.55

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Solution

The fourth proportional to 72,756.48, 100,403.22 and 40,490.55 is: 55,876.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,756.48 : 100,403.22 = 40,490.55 : x
  2. Step 2: Convert to fraction form
    72,756.48/100,403.22 = 40,490.55/x
  3. Step 3: Cross multiply
    72,756.48x = 100,403.22 × 40,490.55
  4. Step 4: Simplify right side
    72,756.48x = 4,065,381,599.57
  5. Step 5: Solve for x
    x = 4,065,381,599.57/72,756.48
  6. Step 6: Final answer
    x = 55,876.56

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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.