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Finding the Fourth Proportional to 93,138.31, 139,663.72 and 43,187.23

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Solution

The fourth proportional to 93,138.31, 139,663.72 and 43,187.23 is: 64,760.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,138.31 : 139,663.72 = 43,187.23 : x
  2. Step 2: Convert to fraction form
    93,138.31/139,663.72 = 43,187.23/x
  3. Step 3: Cross multiply
    93,138.31x = 139,663.72 × 43,187.23
  4. Step 4: Simplify right side
    93,138.31x = 6,031,688,519.79
  5. Step 5: Solve for x
    x = 6,031,688,519.79/93,138.31
  6. Step 6: Final answer
    x = 64,760.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.