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Finding the Fourth Proportional to 361,384.68, 542,078.21 and 91,512.67

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Solution

The fourth proportional to 361,384.68, 542,078.21 and 91,512.67 is: 137,269.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,384.68 : 542,078.21 = 91,512.67 : x
  2. Step 2: Convert to fraction form
    361,384.68/542,078.21 = 91,512.67/x
  3. Step 3: Cross multiply
    361,384.68x = 542,078.21 × 91,512.67
  4. Step 4: Simplify right side
    361,384.68x = 49,607,024,345.92
  5. Step 5: Solve for x
    x = 49,607,024,345.92/361,384.68
  6. Step 6: Final answer
    x = 137,269.31

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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.