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Finding the Fourth Proportional to 139,726.20, 209,573.10 and 39,901.80

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Solution

The fourth proportional to 139,726.20, 209,573.10 and 39,901.80 is: 59,848.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,726.20 : 209,573.10 = 39,901.80 : x
  2. Step 2: Convert to fraction form
    139,726.20/209,573.10 = 39,901.80/x
  3. Step 3: Cross multiply
    139,726.20x = 209,573.10 × 39,901.80
  4. Step 4: Simplify right side
    139,726.20x = 8,362,343,921.58
  5. Step 5: Solve for x
    x = 8,362,343,921.58/139,726.20
  6. Step 6: Final answer
    x = 59,848.07

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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.