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Finding the Fourth Proportional to 72,479.99, 100,022.29 and 40,648.61

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Solution

The fourth proportional to 72,479.99, 100,022.29 and 40,648.61 is: 56,095.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,479.99 : 100,022.29 = 40,648.61 : x
  2. Step 2: Convert to fraction form
    72,479.99/100,022.29 = 40,648.61/x
  3. Step 3: Cross multiply
    72,479.99x = 100,022.29 × 40,648.61
  4. Step 4: Simplify right side
    72,479.99x = 4,065,767,205.95
  5. Step 5: Solve for x
    x = 4,065,767,205.95/72,479.99
  6. Step 6: Final answer
    x = 56,095.03

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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.