Home / 103,140.86-154,948.10-72,815.73

Finding the Fourth Proportional to 103,140.86, 154,948.10 and 72,815.73

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Solution

The fourth proportional to 103,140.86, 154,948.10 and 72,815.73 is: 109,390.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,140.86 : 154,948.10 = 72,815.73 : x
  2. Step 2: Convert to fraction form
    103,140.86/154,948.10 = 72,815.73/x
  3. Step 3: Cross multiply
    103,140.86x = 154,948.10 × 72,815.73
  4. Step 4: Simplify right side
    103,140.86x = 11,282,658,649.53
  5. Step 5: Solve for x
    x = 11,282,658,649.53/103,140.86
  6. Step 6: Final answer
    x = 109,390.78

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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.