Home / 121,409.10-182,113.65-79,418.70

Finding the Fourth Proportional to 121,409.10, 182,113.65 and 79,418.70

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Solution

The fourth proportional to 121,409.10, 182,113.65 and 79,418.70 is: 119,128.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,409.10 : 182,113.65 = 79,418.70 : x
  2. Step 2: Convert to fraction form
    121,409.10/182,113.65 = 79,418.70/x
  3. Step 3: Cross multiply
    121,409.10x = 182,113.65 × 79,418.70
  4. Step 4: Simplify right side
    121,409.10x = 14,463,229,335.26
  5. Step 5: Solve for x
    x = 14,463,229,335.26/121,409.10
  6. Step 6: Final answer
    x = 119,128.05

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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.