Home / 145,115.26-200,248.06-81,440.75

Finding the Fourth Proportional to 145,115.26, 200,248.06 and 81,440.75

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Solution

The fourth proportional to 145,115.26, 200,248.06 and 81,440.75 is: 112,382.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,115.26 : 200,248.06 = 81,440.75 : x
  2. Step 2: Convert to fraction form
    145,115.26/200,248.06 = 81,440.75/x
  3. Step 3: Cross multiply
    145,115.26x = 200,248.06 × 81,440.75
  4. Step 4: Simplify right side
    145,115.26x = 16,308,352,192.45
  5. Step 5: Solve for x
    x = 16,308,352,192.45/145,115.26
  6. Step 6: Final answer
    x = 112,382.06

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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.