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Finding the Fourth Proportional to 70,236.57, 105,354.96 and 28,683.57

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Solution

The fourth proportional to 70,236.57, 105,354.96 and 28,683.57 is: 43,025.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,236.57 : 105,354.96 = 28,683.57 : x
  2. Step 2: Convert to fraction form
    70,236.57/105,354.96 = 28,683.57/x
  3. Step 3: Cross multiply
    70,236.57x = 105,354.96 × 28,683.57
  4. Step 4: Simplify right side
    70,236.57x = 3,021,956,370.01
  5. Step 5: Solve for x
    x = 3,021,956,370.01/70,236.57
  6. Step 6: Final answer
    x = 43,025.40

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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.