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Finding the Fourth Proportional to 559,696.67, 839,544.78 and 138,972.55

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Solution

The fourth proportional to 559,696.67, 839,544.78 and 138,972.55 is: 208,458.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,696.67 : 839,544.78 = 138,972.55 : x
  2. Step 2: Convert to fraction form
    559,696.67/839,544.78 = 138,972.55/x
  3. Step 3: Cross multiply
    559,696.67x = 839,544.78 × 138,972.55
  4. Step 4: Simplify right side
    559,696.67x = 116,673,678,915.79
  5. Step 5: Solve for x
    x = 116,673,678,915.79/559,696.67
  6. Step 6: Final answer
    x = 208,458.77

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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.