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Finding the Fourth Proportional to 272,504.56, 408,840.08 and 139,479.08

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Solution

The fourth proportional to 272,504.56, 408,840.08 and 139,479.08 is: 209,261.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,504.56 : 408,840.08 = 139,479.08 : x
  2. Step 2: Convert to fraction form
    272,504.56/408,840.08 = 139,479.08/x
  3. Step 3: Cross multiply
    272,504.56x = 408,840.08 × 139,479.08
  4. Step 4: Simplify right side
    272,504.56x = 57,024,638,225.53
  5. Step 5: Solve for x
    x = 57,024,638,225.53/272,504.56
  6. Step 6: Final answer
    x = 209,261.23

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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.