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Finding the Fourth Proportional to 208,437.92, 287,743.48 and 139,645.82

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Solution

The fourth proportional to 208,437.92, 287,743.48 and 139,645.82 is: 192,777.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,437.92 : 287,743.48 = 139,645.82 : x
  2. Step 2: Convert to fraction form
    208,437.92/287,743.48 = 139,645.82/x
  3. Step 3: Cross multiply
    208,437.92x = 287,743.48 × 139,645.82
  4. Step 4: Simplify right side
    208,437.92x = 40,182,174,214.25
  5. Step 5: Solve for x
    x = 40,182,174,214.25/208,437.92
  6. Step 6: Final answer
    x = 192,777.66

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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.