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Finding the Fourth Proportional to 70,336.77, 105,515.54 and 20,410.38

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Solution

The fourth proportional to 70,336.77, 105,515.54 and 20,410.38 is: 30,618.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,336.77 : 105,515.54 = 20,410.38 : x
  2. Step 2: Convert to fraction form
    70,336.77/105,515.54 = 20,410.38/x
  3. Step 3: Cross multiply
    70,336.77x = 105,515.54 × 20,410.38
  4. Step 4: Simplify right side
    70,336.77x = 2,153,612,165.25
  5. Step 5: Solve for x
    x = 2,153,612,165.25/70,336.77
  6. Step 6: Final answer
    x = 30,618.58

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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.