Home / 128,692.08-177,596.82-72,102.24

Finding the Fourth Proportional to 128,692.08, 177,596.82 and 72,102.24

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Solution

The fourth proportional to 128,692.08, 177,596.82 and 72,102.24 is: 99,502.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,692.08 : 177,596.82 = 72,102.24 : x
  2. Step 2: Convert to fraction form
    128,692.08/177,596.82 = 72,102.24/x
  3. Step 3: Cross multiply
    128,692.08x = 177,596.82 × 72,102.24
  4. Step 4: Simplify right side
    128,692.08x = 12,805,128,538.88
  5. Step 5: Solve for x
    x = 12,805,128,538.88/128,692.08
  6. Step 6: Final answer
    x = 99,502.07

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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.