Home / 113,220.95-155,974.86-79,165.71

Finding the Fourth Proportional to 113,220.95, 155,974.86 and 79,165.71

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Solution

The fourth proportional to 113,220.95, 155,974.86 and 79,165.71 is: 109,059.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,220.95 : 155,974.86 = 79,165.71 : x
  2. Step 2: Convert to fraction form
    113,220.95/155,974.86 = 79,165.71/x
  3. Step 3: Cross multiply
    113,220.95x = 155,974.86 × 79,165.71
  4. Step 4: Simplify right side
    113,220.95x = 12,347,860,534.05
  5. Step 5: Solve for x
    x = 12,347,860,534.05/113,220.95
  6. Step 6: Final answer
    x = 109,059.86

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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.