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Finding the Fourth Proportional to 93,138.96, 139,032.24 and 86,200.32

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Solution

The fourth proportional to 93,138.96, 139,032.24 and 86,200.32 is: 128,674.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,138.96 : 139,032.24 = 86,200.32 : x
  2. Step 2: Convert to fraction form
    93,138.96/139,032.24 = 86,200.32/x
  3. Step 3: Cross multiply
    93,138.96x = 139,032.24 × 86,200.32
  4. Step 4: Simplify right side
    93,138.96x = 11,984,623,578.32
  5. Step 5: Solve for x
    x = 11,984,623,578.32/93,138.96
  6. Step 6: Final answer
    x = 128,674.66

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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.