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Finding the Fourth Proportional to 272,185.55, 408,361.31 and 139,159.21

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Solution

The fourth proportional to 272,185.55, 408,361.31 and 139,159.21 is: 208,781.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,185.55 : 408,361.31 = 139,159.21 : x
  2. Step 2: Convert to fraction form
    272,185.55/408,361.31 = 139,159.21/x
  3. Step 3: Cross multiply
    272,185.55x = 408,361.31 × 139,159.21
  4. Step 4: Simplify right side
    272,185.55x = 56,827,236,598.37
  5. Step 5: Solve for x
    x = 56,827,236,598.37/272,185.55
  6. Step 6: Final answer
    x = 208,781.24

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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.