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Finding the Fourth Proportional to 70,673.72, 105,969.03 and 28,555.13

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Solution

The fourth proportional to 70,673.72, 105,969.03 and 28,555.13 is: 42,815.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,673.72 : 105,969.03 = 28,555.13 : x
  2. Step 2: Convert to fraction form
    70,673.72/105,969.03 = 28,555.13/x
  3. Step 3: Cross multiply
    70,673.72x = 105,969.03 × 28,555.13
  4. Step 4: Simplify right side
    70,673.72x = 3,025,958,897.78
  5. Step 5: Solve for x
    x = 3,025,958,897.78/70,673.72
  6. Step 6: Final answer
    x = 42,815.90

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1.5x scale

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.