Home / 120,247.89-165,869.79-79,412.39

Finding the Fourth Proportional to 120,247.89, 165,869.79 and 79,412.39

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Solution

The fourth proportional to 120,247.89, 165,869.79 and 79,412.39 is: 109,541.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,247.89 : 165,869.79 = 79,412.39 : x
  2. Step 2: Convert to fraction form
    120,247.89/165,869.79 = 79,412.39/x
  3. Step 3: Cross multiply
    120,247.89x = 165,869.79 × 79,412.39
  4. Step 4: Simplify right side
    120,247.89x = 13,172,116,452.70
  5. Step 5: Solve for x
    x = 13,172,116,452.70/120,247.89
  6. Step 6: Final answer
    x = 109,541.35

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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.