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Finding the Fourth Proportional to 145,399.17, 200,647.17 and 81,741.09

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Solution

The fourth proportional to 145,399.17, 200,647.17 and 81,741.09 is: 112,800.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,399.17 : 200,647.17 = 81,741.09 : x
  2. Step 2: Convert to fraction form
    145,399.17/200,647.17 = 81,741.09/x
  3. Step 3: Cross multiply
    145,399.17x = 200,647.17 × 81,741.09
  4. Step 4: Simplify right side
    145,399.17x = 16,401,118,381.22
  5. Step 5: Solve for x
    x = 16,401,118,381.22/145,399.17
  6. Step 6: Final answer
    x = 112,800.63

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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.