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Finding the Fourth Proportional to 139,486.47, 192,570.44 and 106,719.29

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Solution

The fourth proportional to 139,486.47, 192,570.44 and 106,719.29 is: 147,333.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,486.47 : 192,570.44 = 106,719.29 : x
  2. Step 2: Convert to fraction form
    139,486.47/192,570.44 = 106,719.29/x
  3. Step 3: Cross multiply
    139,486.47x = 192,570.44 × 106,719.29
  4. Step 4: Simplify right side
    139,486.47x = 20,550,980,631.79
  5. Step 5: Solve for x
    x = 20,550,980,631.79/139,486.47
  6. Step 6: Final answer
    x = 147,333.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.