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Finding the Fourth Proportional to 138,439.84, 207,838.32 and 118,844.32

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Solution

The fourth proportional to 138,439.84, 207,838.32 and 118,844.32 is: 178,419.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,439.84 : 207,838.32 = 118,844.32 : x
  2. Step 2: Convert to fraction form
    138,439.84/207,838.32 = 118,844.32/x
  3. Step 3: Cross multiply
    138,439.84x = 207,838.32 × 118,844.32
  4. Step 4: Simplify right side
    138,439.84x = 24,700,403,810.34
  5. Step 5: Solve for x
    x = 24,700,403,810.34/138,439.84
  6. Step 6: Final answer
    x = 178,419.77

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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.