Home / 145,169.30-200,328.45-81,509.78

Finding the Fourth Proportional to 145,169.30, 200,328.45 and 81,509.78

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Solution

The fourth proportional to 145,169.30, 200,328.45 and 81,509.78 is: 112,480.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,169.30 : 200,328.45 = 81,509.78 : x
  2. Step 2: Convert to fraction form
    145,169.30/200,328.45 = 81,509.78/x
  3. Step 3: Cross multiply
    145,169.30x = 200,328.45 × 81,509.78
  4. Step 4: Simplify right side
    145,169.30x = 16,328,727,887.24
  5. Step 5: Solve for x
    x = 16,328,727,887.24/145,169.30
  6. Step 6: Final answer
    x = 112,480.59

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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.