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Finding the Fourth Proportional to 72,590.91, 100,191.45 and 40,336.59

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Solution

The fourth proportional to 72,590.91, 100,191.45 and 40,336.59 is: 55,673.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,590.91 : 100,191.45 = 40,336.59 : x
  2. Step 2: Convert to fraction form
    72,590.91/100,191.45 = 40,336.59/x
  3. Step 3: Cross multiply
    72,590.91x = 100,191.45 × 40,336.59
  4. Step 4: Simplify right side
    72,590.91x = 4,041,381,176.67
  5. Step 5: Solve for x
    x = 4,041,381,176.67/72,590.91
  6. Step 6: Final answer
    x = 55,673.38

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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.