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Finding the Fourth Proportional to 318,004.98, 477,002.61 and 81,345.66

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Solution

The fourth proportional to 318,004.98, 477,002.61 and 81,345.66 is: 122,017.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,004.98 : 477,002.61 = 81,345.66 : x
  2. Step 2: Convert to fraction form
    318,004.98/477,002.61 = 81,345.66/x
  3. Step 3: Cross multiply
    318,004.98x = 477,002.61 × 81,345.66
  4. Step 4: Simplify right side
    318,004.98x = 38,802,092,132.17
  5. Step 5: Solve for x
    x = 38,802,092,132.17/318,004.98
  6. Step 6: Final answer
    x = 122,017.25

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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.