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Finding the Fourth Proportional to 139,158, 208,460.52 and 68,822.64

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Solution

The fourth proportional to 139,158, 208,460.52 and 68,822.64 is: 103,097.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,158 : 208,460.52 = 68,822.64 : x
  2. Step 2: Convert to fraction form
    139,158/208,460.52 = 68,822.64/x
  3. Step 3: Cross multiply
    139,158x = 208,460.52 × 68,822.64
  4. Step 4: Simplify right side
    139,158x = 14,346,803,322.17
  5. Step 5: Solve for x
    x = 14,346,803,322.17/139,158
  6. Step 6: Final answer
    x = 103,097.22

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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.