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Finding the Fourth Proportional to 145,556.93, 200,860.11 and 81,890.93

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Solution

The fourth proportional to 145,556.93, 200,860.11 and 81,890.93 is: 113,004.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,556.93 : 200,860.11 = 81,890.93 : x
  2. Step 2: Convert to fraction form
    145,556.93/200,860.11 = 81,890.93/x
  3. Step 3: Cross multiply
    145,556.93x = 200,860.11 × 81,890.93
  4. Step 4: Simplify right side
    145,556.93x = 16,448,620,203.50
  5. Step 5: Solve for x
    x = 16,448,620,203.50/145,556.93
  6. Step 6: Final answer
    x = 113,004.72

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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.