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Finding the Fourth Proportional to 70,473.86, 105,694.60 and 42,018.86

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Solution

The fourth proportional to 70,473.86, 105,694.60 and 42,018.86 is: 63,018.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,473.86 : 105,694.60 = 42,018.86 : x
  2. Step 2: Convert to fraction form
    70,473.86/105,694.60 = 42,018.86/x
  3. Step 3: Cross multiply
    70,473.86x = 105,694.60 × 42,018.86
  4. Step 4: Simplify right side
    70,473.86x = 4,441,166,071.68
  5. Step 5: Solve for x
    x = 4,441,166,071.68/70,473.86
  6. Step 6: Final answer
    x = 63,018.63

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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.