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Finding the Fourth Proportional to 272,848.90, 409,273.35 and 85,860.40

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Solution

The fourth proportional to 272,848.90, 409,273.35 and 85,860.40 is: 128,790.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,848.90 : 409,273.35 = 85,860.40 : x
  2. Step 2: Convert to fraction form
    272,848.90/409,273.35 = 85,860.40/x
  3. Step 3: Cross multiply
    272,848.90x = 409,273.35 × 85,860.40
  4. Step 4: Simplify right side
    272,848.90x = 35,140,373,540.34
  5. Step 5: Solve for x
    x = 35,140,373,540.34/272,848.90
  6. Step 6: Final answer
    x = 128,790.60

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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.