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Finding the Fourth Proportional to 93,459.26, 128,971.77 and 51,018.50

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Solution

The fourth proportional to 93,459.26, 128,971.77 and 51,018.50 is: 70,404.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,459.26 : 128,971.77 = 51,018.50 : x
  2. Step 2: Convert to fraction form
    93,459.26/128,971.77 = 51,018.50/x
  3. Step 3: Cross multiply
    93,459.26x = 128,971.77 × 51,018.50
  4. Step 4: Simplify right side
    93,459.26x = 6,579,946,247.75
  5. Step 5: Solve for x
    x = 6,579,946,247.75/93,459.26
  6. Step 6: Final answer
    x = 70,404.43

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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.