Home / 145,209.39-200,390.21-81,553.11

Finding the Fourth Proportional to 145,209.39, 200,390.21 and 81,553.11

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Solution

The fourth proportional to 145,209.39, 200,390.21 and 81,553.11 is: 112,543.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,209.39 : 200,390.21 = 81,553.11 : x
  2. Step 2: Convert to fraction form
    145,209.39/200,390.21 = 81,553.11/x
  3. Step 3: Cross multiply
    145,209.39x = 200,390.21 × 81,553.11
  4. Step 4: Simplify right side
    145,209.39x = 16,342,444,431.29
  5. Step 5: Solve for x
    x = 16,342,444,431.29/145,209.39
  6. Step 6: Final answer
    x = 112,543.99

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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.