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Finding the Fourth Proportional to 318,157.77, 477,582.46 and 128,748.54

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Solution

The fourth proportional to 318,157.77, 477,582.46 and 128,748.54 is: 193,262.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,157.77 : 477,582.46 = 128,748.54 : x
  2. Step 2: Convert to fraction form
    318,157.77/477,582.46 = 128,748.54/x
  3. Step 3: Cross multiply
    318,157.77x = 477,582.46 × 128,748.54
  4. Step 4: Simplify right side
    318,157.77x = 61,488,044,132.74
  5. Step 5: Solve for x
    x = 61,488,044,132.74/318,157.77
  6. Step 6: Final answer
    x = 193,262.75

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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.