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Finding the Fourth Proportional to 145,429.80, 200,625.73 and 85,002.99

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Solution

The fourth proportional to 145,429.80, 200,625.73 and 85,002.99 is: 117,264.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,429.80 : 200,625.73 = 85,002.99 : x
  2. Step 2: Convert to fraction form
    145,429.80/200,625.73 = 85,002.99/x
  3. Step 3: Cross multiply
    145,429.80x = 200,625.73 × 85,002.99
  4. Step 4: Simplify right side
    145,429.80x = 17,053,786,920.93
  5. Step 5: Solve for x
    x = 17,053,786,920.93/145,429.80
  6. Step 6: Final answer
    x = 117,264.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.