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Finding the Fourth Proportional to 365,143.78, 547,744.56 and 128,539.54

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Solution

The fourth proportional to 365,143.78, 547,744.56 and 128,539.54 is: 192,819.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    365,143.78 : 547,744.56 = 128,539.54 : x
  2. Step 2: Convert to fraction form
    365,143.78/547,744.56 = 128,539.54/x
  3. Step 3: Cross multiply
    365,143.78x = 547,744.56 × 128,539.54
  4. Step 4: Simplify right side
    365,143.78x = 70,406,833,779.90
  5. Step 5: Solve for x
    x = 70,406,833,779.90/365,143.78
  6. Step 6: Final answer
    x = 192,819.48

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1.5x scale

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.