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Finding the Fourth Proportional to 70,390.44, 105,449.52 and 39,130.92

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Solution

The fourth proportional to 70,390.44, 105,449.52 and 39,130.92 is: 58,620.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,390.44 : 105,449.52 = 39,130.92 : x
  2. Step 2: Convert to fraction form
    70,390.44/105,449.52 = 39,130.92/x
  3. Step 3: Cross multiply
    70,390.44x = 105,449.52 × 39,130.92
  4. Step 4: Simplify right side
    70,390.44x = 4,126,336,731.16
  5. Step 5: Solve for x
    x = 4,126,336,731.16/70,390.44
  6. Step 6: Final answer
    x = 58,620.70

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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.