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Finding the Fourth Proportional to 228,612.16, 315,487.32 and 126,639.20

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Solution

The fourth proportional to 228,612.16, 315,487.32 and 126,639.20 is: 174,763.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,612.16 : 315,487.32 = 126,639.20 : x
  2. Step 2: Convert to fraction form
    228,612.16/315,487.32 = 126,639.20/x
  3. Step 3: Cross multiply
    228,612.16x = 315,487.32 × 126,639.20
  4. Step 4: Simplify right side
    228,612.16x = 39,953,061,814.94
  5. Step 5: Solve for x
    x = 39,953,061,814.94/228,612.16
  6. Step 6: Final answer
    x = 174,763.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.