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Finding the Fourth Proportional to 72,543.40, 100,118.43 and 43,859.68

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Solution

The fourth proportional to 72,543.40, 100,118.43 and 43,859.68 is: 60,531.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,543.40 : 100,118.43 = 43,859.68 : x
  2. Step 2: Convert to fraction form
    72,543.40/100,118.43 = 43,859.68/x
  3. Step 3: Cross multiply
    72,543.40x = 100,118.43 × 43,859.68
  4. Step 4: Simplify right side
    72,543.40x = 4,391,162,051.61
  5. Step 5: Solve for x
    x = 4,391,162,051.61/72,543.40
  6. Step 6: Final answer
    x = 60,531.52

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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.