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Finding the Fourth Proportional to 438,063.87, 657,100.71 and 138,537.21

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Solution

The fourth proportional to 438,063.87, 657,100.71 and 138,537.21 is: 207,807.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,063.87 : 657,100.71 = 138,537.21 : x
  2. Step 2: Convert to fraction form
    438,063.87/657,100.71 = 138,537.21/x
  3. Step 3: Cross multiply
    438,063.87x = 657,100.71 × 138,537.21
  4. Step 4: Simplify right side
    438,063.87x = 91,032,899,052.42
  5. Step 5: Solve for x
    x = 91,032,899,052.42/438,063.87
  6. Step 6: Final answer
    x = 207,807.37

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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.