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Finding the Fourth Proportional to 92,686.40, 139,029.60 and 30,363.20

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Solution

The fourth proportional to 92,686.40, 139,029.60 and 30,363.20 is: 45,544.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,686.40 : 139,029.60 = 30,363.20 : x
  2. Step 2: Convert to fraction form
    92,686.40/139,029.60 = 30,363.20/x
  3. Step 3: Cross multiply
    92,686.40x = 139,029.60 × 30,363.20
  4. Step 4: Simplify right side
    92,686.40x = 4,221,383,550.72
  5. Step 5: Solve for x
    x = 4,221,383,550.72/92,686.40
  6. Step 6: Final answer
    x = 45,544.80

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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.