Home / 257,021.80-385,590.30-99,236.20

Finding the Fourth Proportional to 257,021.80, 385,590.30 and 99,236.20

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Solution

The fourth proportional to 257,021.80, 385,590.30 and 99,236.20 is: 148,876.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,021.80 : 385,590.30 = 99,236.20 : x
  2. Step 2: Convert to fraction form
    257,021.80/385,590.30 = 99,236.20/x
  3. Step 3: Cross multiply
    257,021.80x = 385,590.30 × 99,236.20
  4. Step 4: Simplify right side
    257,021.80x = 38,264,516,128.86
  5. Step 5: Solve for x
    x = 38,264,516,128.86/257,021.80
  6. Step 6: Final answer
    x = 148,876.54

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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.