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Finding the Fourth Proportional to 272,478.76, 408,783.76 and 85,490.26

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Solution

The fourth proportional to 272,478.76, 408,783.76 and 85,490.26 is: 128,255.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,478.76 : 408,783.76 = 85,490.26 : x
  2. Step 2: Convert to fraction form
    272,478.76/408,783.76 = 85,490.26/x
  3. Step 3: Cross multiply
    272,478.76x = 408,783.76 × 85,490.26
  4. Step 4: Simplify right side
    272,478.76x = 34,947,029,926.18
  5. Step 5: Solve for x
    x = 34,947,029,926.18/272,478.76
  6. Step 6: Final answer
    x = 128,255.98

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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.