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Finding the Fourth Proportional to 70,003.10, 105,004.65 and 40,478.60

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Solution

The fourth proportional to 70,003.10, 105,004.65 and 40,478.60 is: 60,717.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,003.10 : 105,004.65 = 40,478.60 : x
  2. Step 2: Convert to fraction form
    70,003.10/105,004.65 = 40,478.60/x
  3. Step 3: Cross multiply
    70,003.10x = 105,004.65 × 40,478.60
  4. Step 4: Simplify right side
    70,003.10x = 4,250,441,225.49
  5. Step 5: Solve for x
    x = 4,250,441,225.49/70,003.10
  6. Step 6: Final answer
    x = 60,717.90

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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.