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Finding the Fourth Proportional to 139,971.78, 209,957.53 and 34,790.74

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Solution

The fourth proportional to 139,971.78, 209,957.53 and 34,790.74 is: 52,186.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,971.78 : 209,957.53 = 34,790.74 : x
  2. Step 2: Convert to fraction form
    139,971.78/209,957.53 = 34,790.74/x
  3. Step 3: Cross multiply
    139,971.78x = 209,957.53 × 34,790.74
  4. Step 4: Simplify right side
    139,971.78x = 7,304,577,837.27
  5. Step 5: Solve for x
    x = 7,304,577,837.27/139,971.78
  6. Step 6: Final answer
    x = 52,186.08

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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.