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Finding the Fourth Proportional to 93,137.96, 139,030.75 and 86,199.32

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Solution

The fourth proportional to 93,137.96, 139,030.75 and 86,199.32 is: 128,673.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,137.96 : 139,030.75 = 86,199.32 : x
  2. Step 2: Convert to fraction form
    93,137.96/139,030.75 = 86,199.32/x
  3. Step 3: Cross multiply
    93,137.96x = 139,030.75 × 86,199.32
  4. Step 4: Simplify right side
    93,137.96x = 11,984,356,109.09
  5. Step 5: Solve for x
    x = 11,984,356,109.09/93,137.96
  6. Step 6: Final answer
    x = 128,673.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.