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Finding the Fourth Proportional to 139,776.30, 209,254.39 and 125,347.57

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Solution

The fourth proportional to 139,776.30, 209,254.39 and 125,347.57 is: 187,653.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,776.30 : 209,254.39 = 125,347.57 : x
  2. Step 2: Convert to fraction form
    139,776.30/209,254.39 = 125,347.57/x
  3. Step 3: Cross multiply
    139,776.30x = 209,254.39 × 125,347.57
  4. Step 4: Simplify right side
    139,776.30x = 26,229,528,461.83
  5. Step 5: Solve for x
    x = 26,229,528,461.83/139,776.30
  6. Step 6: Final answer
    x = 187,653.62

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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.