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Finding the Fourth Proportional to 139,712.77, 209,569.22 and 46,218.52

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Solution

The fourth proportional to 139,712.77, 209,569.22 and 46,218.52 is: 69,327.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,712.77 : 209,569.22 = 46,218.52 : x
  2. Step 2: Convert to fraction form
    139,712.77/209,569.22 = 46,218.52/x
  3. Step 3: Cross multiply
    139,712.77x = 209,569.22 × 46,218.52
  4. Step 4: Simplify right side
    139,712.77x = 9,685,979,185.95
  5. Step 5: Solve for x
    x = 9,685,979,185.95/139,712.77
  6. Step 6: Final answer
    x = 69,327.80

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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.