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Finding the Fourth Proportional to 128,187.66, 176,900.82 and 70,828.32

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Solution

The fourth proportional to 128,187.66, 176,900.82 and 70,828.32 is: 97,744.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,187.66 : 176,900.82 = 70,828.32 : x
  2. Step 2: Convert to fraction form
    128,187.66/176,900.82 = 70,828.32/x
  3. Step 3: Cross multiply
    128,187.66x = 176,900.82 × 70,828.32
  4. Step 4: Simplify right side
    128,187.66x = 12,529,587,887.22
  5. Step 5: Solve for x
    x = 12,529,587,887.22/128,187.66
  6. Step 6: Final answer
    x = 97,744.10

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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.