Home / 105,215.80-145,250.19-64,951.77

Finding the Fourth Proportional to 105,215.80, 145,250.19 and 64,951.77

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Solution

The fourth proportional to 105,215.80, 145,250.19 and 64,951.77 is: 89,665.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,215.80 : 145,250.19 = 64,951.77 : x
  2. Step 2: Convert to fraction form
    105,215.80/145,250.19 = 64,951.77/x
  3. Step 3: Cross multiply
    105,215.80x = 145,250.19 × 64,951.77
  4. Step 4: Simplify right side
    105,215.80x = 9,434,256,145.08
  5. Step 5: Solve for x
    x = 9,434,256,145.08/105,215.80
  6. Step 6: Final answer
    x = 89,665.77

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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.