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Finding the Fourth Proportional to 93,141.96, 139,036.73 and 86,203.32

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Solution

The fourth proportional to 93,141.96, 139,036.73 and 86,203.32 is: 128,679.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,141.96 : 139,036.73 = 86,203.32 : x
  2. Step 2: Convert to fraction form
    93,141.96/139,036.73 = 86,203.32/x
  3. Step 3: Cross multiply
    93,141.96x = 139,036.73 × 86,203.32
  4. Step 4: Simplify right side
    93,141.96x = 11,985,427,296.93
  5. Step 5: Solve for x
    x = 11,985,427,296.93/93,141.96
  6. Step 6: Final answer
    x = 128,679.14

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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.