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Finding the Fourth Proportional to 145,072.77, 200,214.81 and 81,410.82

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Solution

The fourth proportional to 145,072.77, 200,214.81 and 81,410.82 is: 112,355.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,072.77 : 200,214.81 = 81,410.82 : x
  2. Step 2: Convert to fraction form
    145,072.77/200,214.81 = 81,410.82/x
  3. Step 3: Cross multiply
    145,072.77x = 200,214.81 × 81,410.82
  4. Step 4: Simplify right side
    145,072.77x = 16,299,651,858.24
  5. Step 5: Solve for x
    x = 16,299,651,858.24/145,072.77
  6. Step 6: Final answer
    x = 112,355.01

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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.