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Finding the Fourth Proportional to 93,039.84, 128,440.08 and 87,071.76

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Solution

The fourth proportional to 93,039.84, 128,440.08 and 87,071.76 is: 120,201.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,039.84 : 128,440.08 = 87,071.76 : x
  2. Step 2: Convert to fraction form
    93,039.84/128,440.08 = 87,071.76/x
  3. Step 3: Cross multiply
    93,039.84x = 128,440.08 × 87,071.76
  4. Step 4: Simplify right side
    93,039.84x = 11,183,503,820.14
  5. Step 5: Solve for x
    x = 11,183,503,820.14/93,039.84
  6. Step 6: Final answer
    x = 120,201.24

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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.