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Finding the Fourth Proportional to 70,137.29, 105,679.35 and 57,930.80

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Solution

The fourth proportional to 70,137.29, 105,679.35 and 57,930.80 is: 87,287.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,137.29 : 105,679.35 = 57,930.80 : x
  2. Step 2: Convert to fraction form
    70,137.29/105,679.35 = 57,930.80/x
  3. Step 3: Cross multiply
    70,137.29x = 105,679.35 × 57,930.80
  4. Step 4: Simplify right side
    70,137.29x = 6,122,088,760.58
  5. Step 5: Solve for x
    x = 6,122,088,760.58/70,137.29
  6. Step 6: Final answer
    x = 87,287.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.