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Finding the Fourth Proportional to 70,505.39, 105,262.62 and 53,776.19

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Solution

The fourth proportional to 70,505.39, 105,262.62 and 53,776.19 is: 80,286.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,505.39 : 105,262.62 = 53,776.19 : x
  2. Step 2: Convert to fraction form
    70,505.39/105,262.62 = 53,776.19/x
  3. Step 3: Cross multiply
    70,505.39x = 105,262.62 × 53,776.19
  4. Step 4: Simplify right side
    70,505.39x = 5,660,621,857.82
  5. Step 5: Solve for x
    x = 5,660,621,857.82/70,505.39
  6. Step 6: Final answer
    x = 80,286.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.