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Finding the Fourth Proportional to 272,259.90, 408,061.80 and 139,071.60

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Solution

The fourth proportional to 272,259.90, 408,061.80 and 139,071.60 is: 208,439.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,259.90 : 408,061.80 = 139,071.60 : x
  2. Step 2: Convert to fraction form
    272,259.90/408,061.80 = 139,071.60/x
  3. Step 3: Cross multiply
    272,259.90x = 408,061.80 × 139,071.60
  4. Step 4: Simplify right side
    272,259.90x = 56,749,807,424.88
  5. Step 5: Solve for x
    x = 56,749,807,424.88/272,259.90
  6. Step 6: Final answer
    x = 208,439.83

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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.