Home / 103,400.20-142,780.98-100,056.52

Finding the Fourth Proportional to 103,400.20, 142,780.98 and 100,056.52

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Solution

The fourth proportional to 103,400.20, 142,780.98 and 100,056.52 is: 138,163.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,400.20 : 142,780.98 = 100,056.52 : x
  2. Step 2: Convert to fraction form
    103,400.20/142,780.98 = 100,056.52/x
  3. Step 3: Cross multiply
    103,400.20x = 142,780.98 × 100,056.52
  4. Step 4: Simplify right side
    103,400.20x = 14,286,167,980.99
  5. Step 5: Solve for x
    x = 14,286,167,980.99/103,400.20
  6. Step 6: Final answer
    x = 138,163.83

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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.