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Finding the Fourth Proportional to 76,108.68, 105,072.20 and 45,901.68

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Solution

The fourth proportional to 76,108.68, 105,072.20 and 45,901.68 is: 63,369.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,108.68 : 105,072.20 = 45,901.68 : x
  2. Step 2: Convert to fraction form
    76,108.68/105,072.20 = 45,901.68/x
  3. Step 3: Cross multiply
    76,108.68x = 105,072.20 × 45,901.68
  4. Step 4: Simplify right side
    76,108.68x = 4,822,990,501.30
  5. Step 5: Solve for x
    x = 4,822,990,501.30/76,108.68
  6. Step 6: Final answer
    x = 63,369.78

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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.