Home / 125,579.40-188,369.10-81,256.20

Finding the Fourth Proportional to 125,579.40, 188,369.10 and 81,256.20

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Solution

The fourth proportional to 125,579.40, 188,369.10 and 81,256.20 is: 121,884.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,579.40 : 188,369.10 = 81,256.20 : x
  2. Step 2: Convert to fraction form
    125,579.40/188,369.10 = 81,256.20/x
  3. Step 3: Cross multiply
    125,579.40x = 188,369.10 × 81,256.20
  4. Step 4: Simplify right side
    125,579.40x = 15,306,157,263.42
  5. Step 5: Solve for x
    x = 15,306,157,263.42/125,579.40
  6. Step 6: Final answer
    x = 121,884.30

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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.