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Finding the Fourth Proportional to 318,117.92, 477,051.32 and 128,542.55

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Solution

The fourth proportional to 318,117.92, 477,051.32 and 128,542.55 is: 192,763.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,117.92 : 477,051.32 = 128,542.55 : x
  2. Step 2: Convert to fraction form
    318,117.92/477,051.32 = 128,542.55/x
  3. Step 3: Cross multiply
    318,117.92x = 477,051.32 × 128,542.55
  4. Step 4: Simplify right side
    318,117.92x = 61,321,391,089.77
  5. Step 5: Solve for x
    x = 61,321,391,089.77/318,117.92
  6. Step 6: Final answer
    x = 192,763.09

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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.