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Finding the Fourth Proportional to 228,661.20, 342,991.80 and 70,905.60

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Solution

The fourth proportional to 228,661.20, 342,991.80 and 70,905.60 is: 106,358.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,661.20 : 342,991.80 = 70,905.60 : x
  2. Step 2: Convert to fraction form
    228,661.20/342,991.80 = 70,905.60/x
  3. Step 3: Cross multiply
    228,661.20x = 342,991.80 × 70,905.60
  4. Step 4: Simplify right side
    228,661.20x = 24,320,039,374.08
  5. Step 5: Solve for x
    x = 24,320,039,374.08/228,661.20
  6. Step 6: Final answer
    x = 106,358.40

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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.