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Finding the Fourth Proportional to 45,336.60, 68,004.90 and 42,420.60

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Solution

The fourth proportional to 45,336.60, 68,004.90 and 42,420.60 is: 63,630.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,336.60 : 68,004.90 = 42,420.60 : x
  2. Step 2: Convert to fraction form
    45,336.60/68,004.90 = 42,420.60/x
  3. Step 3: Cross multiply
    45,336.60x = 68,004.90 × 42,420.60
  4. Step 4: Simplify right side
    45,336.60x = 2,884,808,660.94
  5. Step 5: Solve for x
    x = 2,884,808,660.94/45,336.60
  6. Step 6: Final answer
    x = 63,630.90

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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.