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Finding the Fourth Proportional to 72,852.69, 100,543.91 and 42,636.21

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Solution

The fourth proportional to 72,852.69, 100,543.91 and 42,636.21 is: 58,842.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,852.69 : 100,543.91 = 42,636.21 : x
  2. Step 2: Convert to fraction form
    72,852.69/100,543.91 = 42,636.21/x
  3. Step 3: Cross multiply
    72,852.69x = 100,543.91 × 42,636.21
  4. Step 4: Simplify right side
    72,852.69x = 4,286,811,260.98
  5. Step 5: Solve for x
    x = 4,286,811,260.98/72,852.69
  6. Step 6: Final answer
    x = 58,842.18

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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.