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Finding the Fourth Proportional to 272,783.57, 409,239.74 and 85,795.07

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Solution

The fourth proportional to 272,783.57, 409,239.74 and 85,795.07 is: 128,712.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,783.57 : 409,239.74 = 85,795.07 : x
  2. Step 2: Convert to fraction form
    272,783.57/409,239.74 = 85,795.07/x
  3. Step 3: Cross multiply
    272,783.57x = 409,239.74 × 85,795.07
  4. Step 4: Simplify right side
    272,783.57x = 35,110,750,308.37
  5. Step 5: Solve for x
    x = 35,110,750,308.37/272,783.57
  6. Step 6: Final answer
    x = 128,712.85

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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.