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Finding the Fourth Proportional to 145,071.77, 200,213.43 and 81,409.82

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Solution

The fourth proportional to 145,071.77, 200,213.43 and 81,409.82 is: 112,353.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,071.77 : 200,213.43 = 81,409.82 : x
  2. Step 2: Convert to fraction form
    145,071.77/200,213.43 = 81,409.82/x
  3. Step 3: Cross multiply
    145,071.77x = 200,213.43 × 81,409.82
  4. Step 4: Simplify right side
    145,071.77x = 16,299,339,346.69
  5. Step 5: Solve for x
    x = 16,299,339,346.69/145,071.77
  6. Step 6: Final answer
    x = 112,353.63

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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.