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Finding the Fourth Proportional to 70,776.69, 106,165.86 and 28,092.60

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Solution

The fourth proportional to 70,776.69, 106,165.86 and 28,092.60 is: 42,139.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,776.69 : 106,165.86 = 28,092.60 : x
  2. Step 2: Convert to fraction form
    70,776.69/106,165.86 = 28,092.60/x
  3. Step 3: Cross multiply
    70,776.69x = 106,165.86 × 28,092.60
  4. Step 4: Simplify right side
    70,776.69x = 2,982,475,038.64
  5. Step 5: Solve for x
    x = 2,982,475,038.64/70,776.69
  6. Step 6: Final answer
    x = 42,139.23

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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.