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Finding the Fourth Proportional to 272,258.90, 408,060.30 and 139,070.60

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Solution

The fourth proportional to 272,258.90, 408,060.30 and 139,070.60 is: 208,438.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,258.90 : 408,060.30 = 139,070.60 : x
  2. Step 2: Convert to fraction form
    272,258.90/408,060.30 = 139,070.60/x
  3. Step 3: Cross multiply
    272,258.90x = 408,060.30 × 139,070.60
  4. Step 4: Simplify right side
    272,258.90x = 56,749,190,757.18
  5. Step 5: Solve for x
    x = 56,749,190,757.18/272,258.90
  6. Step 6: Final answer
    x = 208,438.33

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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.