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Finding the Fourth Proportional to 128,324.61, 177,089.10 and 70,967.82

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Solution

The fourth proportional to 128,324.61, 177,089.10 and 70,967.82 is: 97,936.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,324.61 : 177,089.10 = 70,967.82 : x
  2. Step 2: Convert to fraction form
    128,324.61/177,089.10 = 70,967.82/x
  3. Step 3: Cross multiply
    128,324.61x = 177,089.10 × 70,967.82
  4. Step 4: Simplify right side
    128,324.61x = 12,567,627,372.76
  5. Step 5: Solve for x
    x = 12,567,627,372.76/128,324.61
  6. Step 6: Final answer
    x = 97,936.22

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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.