Home / 145,553.19-200,861.98-81,021.40

Finding the Fourth Proportional to 145,553.19, 200,861.98 and 81,021.40

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Solution

The fourth proportional to 145,553.19, 200,861.98 and 81,021.40 is: 111,808.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,553.19 : 200,861.98 = 81,021.40 : x
  2. Step 2: Convert to fraction form
    145,553.19/200,861.98 = 81,021.40/x
  3. Step 3: Cross multiply
    145,553.19x = 200,861.98 × 81,021.40
  4. Step 4: Simplify right side
    145,553.19x = 16,274,118,121.66
  5. Step 5: Solve for x
    x = 16,274,118,121.66/145,553.19
  6. Step 6: Final answer
    x = 111,808.74

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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.