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Finding the Fourth Proportional to 142,804.98, 214,252.25 and 85,940.93

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Solution

The fourth proportional to 142,804.98, 214,252.25 and 85,940.93 is: 128,938.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,804.98 : 214,252.25 = 85,940.93 : x
  2. Step 2: Convert to fraction form
    142,804.98/214,252.25 = 85,940.93/x
  3. Step 3: Cross multiply
    142,804.98x = 214,252.25 × 85,940.93
  4. Step 4: Simplify right side
    142,804.98x = 18,413,036,118.63
  5. Step 5: Solve for x
    x = 18,413,036,118.63/142,804.98
  6. Step 6: Final answer
    x = 128,938.33

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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.