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Finding the Fourth Proportional to 70,213.77, 105,113.07 and 45,179.91

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Solution

The fourth proportional to 70,213.77, 105,113.07 and 45,179.91 is: 67,636.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,213.77 : 105,113.07 = 45,179.91 : x
  2. Step 2: Convert to fraction form
    70,213.77/105,113.07 = 45,179.91/x
  3. Step 3: Cross multiply
    70,213.77x = 105,113.07 × 45,179.91
  4. Step 4: Simplify right side
    70,213.77x = 4,748,999,042.42
  5. Step 5: Solve for x
    x = 4,748,999,042.42/70,213.77
  6. Step 6: Final answer
    x = 67,636.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.