Home / 145,087.57-200,240.40-81,428.86

Finding the Fourth Proportional to 145,087.57, 200,240.40 and 81,428.86

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Solution

The fourth proportional to 145,087.57, 200,240.40 and 81,428.86 is: 112,382.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,087.57 : 200,240.40 = 81,428.86 : x
  2. Step 2: Convert to fraction form
    145,087.57/200,240.40 = 81,428.86/x
  3. Step 3: Cross multiply
    145,087.57x = 200,240.40 × 81,428.86
  4. Step 4: Simplify right side
    145,087.57x = 16,305,347,497.94
  5. Step 5: Solve for x
    x = 16,305,347,497.94/145,087.57
  6. Step 6: Final answer
    x = 112,382.80

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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.