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Finding the Fourth Proportional to 128,222.22, 176,971.11 and 84,538.06

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Solution

The fourth proportional to 128,222.22, 176,971.11 and 84,538.06 is: 116,678.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,222.22 : 176,971.11 = 84,538.06 : x
  2. Step 2: Convert to fraction form
    128,222.22/176,971.11 = 84,538.06/x
  3. Step 3: Cross multiply
    128,222.22x = 176,971.11 × 84,538.06
  4. Step 4: Simplify right side
    128,222.22x = 14,960,794,551.46
  5. Step 5: Solve for x
    x = 14,960,794,551.46/128,222.22
  6. Step 6: Final answer
    x = 116,678.64

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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.