Home / 103,421.37-142,716.68-57,478.88

Finding the Fourth Proportional to 103,421.37, 142,716.68 and 57,478.88

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Solution

The fourth proportional to 103,421.37, 142,716.68 and 57,478.88 is: 79,318.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,421.37 : 142,716.68 = 57,478.88 : x
  2. Step 2: Convert to fraction form
    103,421.37/142,716.68 = 57,478.88/x
  3. Step 3: Cross multiply
    103,421.37x = 142,716.68 × 57,478.88
  4. Step 4: Simplify right side
    103,421.37x = 8,203,195,531.98
  5. Step 5: Solve for x
    x = 8,203,195,531.98/103,421.37
  6. Step 6: Final answer
    x = 79,318.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.