Home / 103,633.15-155,449.73-78,749.95

Finding the Fourth Proportional to 103,633.15, 155,449.73 and 78,749.95

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Solution

The fourth proportional to 103,633.15, 155,449.73 and 78,749.95 is: 118,124.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,633.15 : 155,449.73 = 78,749.95 : x
  2. Step 2: Convert to fraction form
    103,633.15/155,449.73 = 78,749.95/x
  3. Step 3: Cross multiply
    103,633.15x = 155,449.73 × 78,749.95
  4. Step 4: Simplify right side
    103,633.15x = 12,241,658,465.01
  5. Step 5: Solve for x
    x = 12,241,658,465.01/103,633.15
  6. Step 6: Final answer
    x = 118,124.93

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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.