Home / 145,080.12-200,211.78-81,432.96

Finding the Fourth Proportional to 145,080.12, 200,211.78 and 81,432.96

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Solution

The fourth proportional to 145,080.12, 200,211.78 and 81,432.96 is: 112,378.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,080.12 : 200,211.78 = 81,432.96 : x
  2. Step 2: Convert to fraction form
    145,080.12/200,211.78 = 81,432.96/x
  3. Step 3: Cross multiply
    145,080.12x = 200,211.78 × 81,432.96
  4. Step 4: Simplify right side
    145,080.12x = 16,303,837,872.27
  5. Step 5: Solve for x
    x = 16,303,837,872.27/145,080.12
  6. Step 6: Final answer
    x = 112,378.17

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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.