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Finding the Fourth Proportional to 261,383.02, 392,089.14 and 74,379.94

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Solution

The fourth proportional to 261,383.02, 392,089.14 and 74,379.94 is: 111,574.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,383.02 : 392,089.14 = 74,379.94 : x
  2. Step 2: Convert to fraction form
    261,383.02/392,089.14 = 74,379.94/x
  3. Step 3: Cross multiply
    261,383.02x = 392,089.14 × 74,379.94
  4. Step 4: Simplify right side
    261,383.02x = 29,163,565,727.63
  5. Step 5: Solve for x
    x = 29,163,565,727.63/261,383.02
  6. Step 6: Final answer
    x = 111,574.06

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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.