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Finding the Fourth Proportional to 70,890.21, 97,842.61 and 40,695.93

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Solution

The fourth proportional to 70,890.21, 97,842.61 and 40,695.93 is: 56,168.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,890.21 : 97,842.61 = 40,695.93 : x
  2. Step 2: Convert to fraction form
    70,890.21/97,842.61 = 40,695.93/x
  3. Step 3: Cross multiply
    70,890.21x = 97,842.61 × 40,695.93
  4. Step 4: Simplify right side
    70,890.21x = 3,981,796,007.58
  5. Step 5: Solve for x
    x = 3,981,796,007.58/70,890.21
  6. Step 6: Final answer
    x = 56,168.49

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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.