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Finding the Fourth Proportional to 92,947.20, 139,420.80 and 30,609.60

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Solution

The fourth proportional to 92,947.20, 139,420.80 and 30,609.60 is: 45,914.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,947.20 : 139,420.80 = 30,609.60 : x
  2. Step 2: Convert to fraction form
    92,947.20/139,420.80 = 30,609.60/x
  3. Step 3: Cross multiply
    92,947.20x = 139,420.80 × 30,609.60
  4. Step 4: Simplify right side
    92,947.20x = 4,267,614,919.68
  5. Step 5: Solve for x
    x = 4,267,614,919.68/92,947.20
  6. Step 6: Final answer
    x = 45,914.40

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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.