Home / 72,686.94-100,306.35-40,854.78

Finding the Fourth Proportional to 72,686.94, 100,306.35 and 40,854.78

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Solution

The fourth proportional to 72,686.94, 100,306.35 and 40,854.78 is: 56,378.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,686.94 : 100,306.35 = 40,854.78 : x
  2. Step 2: Convert to fraction form
    72,686.94/100,306.35 = 40,854.78/x
  3. Step 3: Cross multiply
    72,686.94x = 100,306.35 × 40,854.78
  4. Step 4: Simplify right side
    72,686.94x = 4,097,993,861.85
  5. Step 5: Solve for x
    x = 4,097,993,861.85/72,686.94
  6. Step 6: Final answer
    x = 56,378.68

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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.