Home / 145,163.16-200,320.00-81,503.64

Finding the Fourth Proportional to 145,163.16, 200,320.00 and 81,503.64

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Solution

The fourth proportional to 145,163.16, 200,320.00 and 81,503.64 is: 112,472.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,163.16 : 200,320.00 = 81,503.64 : x
  2. Step 2: Convert to fraction form
    145,163.16/200,320.00 = 81,503.64/x
  3. Step 3: Cross multiply
    145,163.16x = 200,320.00 × 81,503.64
  4. Step 4: Simplify right side
    145,163.16x = 16,326,808,961.04
  5. Step 5: Solve for x
    x = 16,326,808,961.04/145,163.16
  6. Step 6: Final answer
    x = 112,472.12

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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.