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Finding the Fourth Proportional to 92,698.20, 139,039.20 and 30,368.70

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Solution

The fourth proportional to 92,698.20, 139,039.20 and 30,368.70 is: 45,550.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,698.20 : 139,039.20 = 30,368.70 : x
  2. Step 2: Convert to fraction form
    92,698.20/139,039.20 = 30,368.70/x
  3. Step 3: Cross multiply
    92,698.20x = 139,039.20 × 30,368.70
  4. Step 4: Simplify right side
    92,698.20x = 4,222,439,753.04
  5. Step 5: Solve for x
    x = 4,222,439,753.04/92,698.20
  6. Step 6: Final answer
    x = 45,550.40

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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.