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Finding the Fourth Proportional to 70,519.46, 105,679.74 and 38,943.74

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Solution

The fourth proportional to 70,519.46, 105,679.74 and 38,943.74 is: 58,360.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,519.46 : 105,679.74 = 38,943.74 : x
  2. Step 2: Convert to fraction form
    70,519.46/105,679.74 = 38,943.74/x
  3. Step 3: Cross multiply
    70,519.46x = 105,679.74 × 38,943.74
  4. Step 4: Simplify right side
    70,519.46x = 4,115,563,789.43
  5. Step 5: Solve for x
    x = 4,115,563,789.43/70,519.46
  6. Step 6: Final answer
    x = 58,360.69

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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.