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Finding the Fourth Proportional to 70,422.90, 105,599.78 and 34,843.12

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Solution

The fourth proportional to 70,422.90, 105,599.78 and 34,843.12 is: 52,247.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,422.90 : 105,599.78 = 34,843.12 : x
  2. Step 2: Convert to fraction form
    70,422.90/105,599.78 = 34,843.12/x
  3. Step 3: Cross multiply
    70,422.90x = 105,599.78 × 34,843.12
  4. Step 4: Simplify right side
    70,422.90x = 3,679,425,806.51
  5. Step 5: Solve for x
    x = 3,679,425,806.51/70,422.90
  6. Step 6: Final answer
    x = 52,247.58

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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.