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Finding the Fourth Proportional to 70,418.30, 105,636.62 and 37,139.58

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Solution

The fourth proportional to 70,418.30, 105,636.62 and 37,139.58 is: 55,714.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,418.30 : 105,636.62 = 37,139.58 : x
  2. Step 2: Convert to fraction form
    70,418.30/105,636.62 = 37,139.58/x
  3. Step 3: Cross multiply
    70,418.30x = 105,636.62 × 37,139.58
  4. Step 4: Simplify right side
    70,418.30x = 3,923,299,792.27
  5. Step 5: Solve for x
    x = 3,923,299,792.27/70,418.30
  6. Step 6: Final answer
    x = 55,714.21

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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.