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Finding the Fourth Proportional to 356,427.63, 534,636.83 and 86,557.98

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Solution

The fourth proportional to 356,427.63, 534,636.83 and 86,557.98 is: 129,835.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,427.63 : 534,636.83 = 86,557.98 : x
  2. Step 2: Convert to fraction form
    356,427.63/534,636.83 = 86,557.98/x
  3. Step 3: Cross multiply
    356,427.63x = 534,636.83 × 86,557.98
  4. Step 4: Simplify right side
    356,427.63x = 46,277,080,932.43
  5. Step 5: Solve for x
    x = 46,277,080,932.43/356,427.63
  6. Step 6: Final answer
    x = 129,835.84

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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.