Home / 145,342.90-200,571.96-81,680.56

Finding the Fourth Proportional to 145,342.90, 200,571.96 and 81,680.56

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Solution

The fourth proportional to 145,342.90, 200,571.96 and 81,680.56 is: 112,718.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,342.90 : 200,571.96 = 81,680.56 : x
  2. Step 2: Convert to fraction form
    145,342.90/200,571.96 = 81,680.56/x
  3. Step 3: Cross multiply
    145,342.90x = 200,571.96 × 81,680.56
  4. Step 4: Simplify right side
    145,342.90x = 16,382,830,013.10
  5. Step 5: Solve for x
    x = 16,382,830,013.10/145,342.90
  6. Step 6: Final answer
    x = 112,718.47

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1.5x scale

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.