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Finding the Fourth Proportional to 139,322.07, 208,955.16 and 68,214.06

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Solution

The fourth proportional to 139,322.07, 208,955.16 and 68,214.06 is: 102,307.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,322.07 : 208,955.16 = 68,214.06 : x
  2. Step 2: Convert to fraction form
    139,322.07/208,955.16 = 68,214.06/x
  3. Step 3: Cross multiply
    139,322.07x = 208,955.16 × 68,214.06
  4. Step 4: Simplify right side
    139,322.07x = 14,253,679,821.55
  5. Step 5: Solve for x
    x = 14,253,679,821.55/139,322.07
  6. Step 6: Final answer
    x = 102,307.41

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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.