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Finding the Fourth Proportional to 145,021.98, 200,127.32 and 80,487.48

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Solution

The fourth proportional to 145,021.98, 200,127.32 and 80,487.48 is: 111,071.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,021.98 : 200,127.32 = 80,487.48 : x
  2. Step 2: Convert to fraction form
    145,021.98/200,127.32 = 80,487.48/x
  3. Step 3: Cross multiply
    145,021.98x = 200,127.32 × 80,487.48
  4. Step 4: Simplify right side
    145,021.98x = 16,107,743,665.95
  5. Step 5: Solve for x
    x = 16,107,743,665.95/145,021.98
  6. Step 6: Final answer
    x = 111,071.05

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1.5x scale

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.