Home / 103,520.95-155,235.22-72,132.68

Finding the Fourth Proportional to 103,520.95, 155,235.22 and 72,132.68

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Solution

The fourth proportional to 103,520.95, 155,235.22 and 72,132.68 is: 108,166.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,520.95 : 155,235.22 = 72,132.68 : x
  2. Step 2: Convert to fraction form
    103,520.95/155,235.22 = 72,132.68/x
  3. Step 3: Cross multiply
    103,520.95x = 155,235.22 × 72,132.68
  4. Step 4: Simplify right side
    103,520.95x = 11,197,532,448.99
  5. Step 5: Solve for x
    x = 11,197,532,448.99/103,520.95
  6. Step 6: Final answer
    x = 108,166.82

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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.