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Finding the Fourth Proportional to 86,110.80, 128,935.80 and 54,776.40

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Solution

The fourth proportional to 86,110.80, 128,935.80 and 54,776.40 is: 82,018.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,110.80 : 128,935.80 = 54,776.40 : x
  2. Step 2: Convert to fraction form
    86,110.80/128,935.80 = 54,776.40/x
  3. Step 3: Cross multiply
    86,110.80x = 128,935.80 × 54,776.40
  4. Step 4: Simplify right side
    86,110.80x = 7,062,638,955.12
  5. Step 5: Solve for x
    x = 7,062,638,955.12/86,110.80
  6. Step 6: Final answer
    x = 82,018.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.