Home / 145,342.47-200,571.35-81,680.12

Finding the Fourth Proportional to 145,342.47, 200,571.35 and 81,680.12

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Solution

The fourth proportional to 145,342.47, 200,571.35 and 81,680.12 is: 112,717.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,342.47 : 200,571.35 = 81,680.12 : x
  2. Step 2: Convert to fraction form
    145,342.47/200,571.35 = 81,680.12/x
  3. Step 3: Cross multiply
    145,342.47x = 200,571.35 × 81,680.12
  4. Step 4: Simplify right side
    145,342.47x = 16,382,690,525.30
  5. Step 5: Solve for x
    x = 16,382,690,525.30/145,342.47
  6. Step 6: Final answer
    x = 112,717.85

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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.