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Finding the Fourth Proportional to 210,630.80, 315,946.20 and 92,176.40

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Solution

The fourth proportional to 210,630.80, 315,946.20 and 92,176.40 is: 138,264.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,630.80 : 315,946.20 = 92,176.40 : x
  2. Step 2: Convert to fraction form
    210,630.80/315,946.20 = 92,176.40/x
  3. Step 3: Cross multiply
    210,630.80x = 315,946.20 × 92,176.40
  4. Step 4: Simplify right side
    210,630.80x = 29,122,783,309.68
  5. Step 5: Solve for x
    x = 29,122,783,309.68/210,630.80
  6. Step 6: Final answer
    x = 138,264.60

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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.