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Finding the Fourth Proportional to 103,863.34, 155,933.39 and 70,242.31

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Solution

The fourth proportional to 103,863.34, 155,933.39 and 70,242.31 is: 105,457.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,863.34 : 155,933.39 = 70,242.31 : x
  2. Step 2: Convert to fraction form
    103,863.34/155,933.39 = 70,242.31/x
  3. Step 3: Cross multiply
    103,863.34x = 155,933.39 × 70,242.31
  4. Step 4: Simplify right side
    103,863.34x = 10,953,121,519.73
  5. Step 5: Solve for x
    x = 10,953,121,519.73/103,863.34
  6. Step 6: Final answer
    x = 105,457.05

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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.