Home / 315,096.40-472,702.20-128,126.80

Finding the Fourth Proportional to 315,096.40, 472,702.20 and 128,126.80

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Solution

The fourth proportional to 315,096.40, 472,702.20 and 128,126.80 is: 192,213.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,096.40 : 472,702.20 = 128,126.80 : x
  2. Step 2: Convert to fraction form
    315,096.40/472,702.20 = 128,126.80/x
  3. Step 3: Cross multiply
    315,096.40x = 472,702.20 × 128,126.80
  4. Step 4: Simplify right side
    315,096.40x = 60,565,820,238.96
  5. Step 5: Solve for x
    x = 60,565,820,238.96/315,096.40
  6. Step 6: Final answer
    x = 192,213.62

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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.