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Finding the Fourth Proportional to 93,140.46, 139,034.49 and 86,201.82

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Solution

The fourth proportional to 93,140.46, 139,034.49 and 86,201.82 is: 128,676.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,140.46 : 139,034.49 = 86,201.82 : x
  2. Step 2: Convert to fraction form
    93,140.46/139,034.49 = 86,201.82/x
  3. Step 3: Cross multiply
    93,140.46x = 139,034.49 × 86,201.82
  4. Step 4: Simplify right side
    93,140.46x = 11,985,026,080.77
  5. Step 5: Solve for x
    x = 11,985,026,080.77/93,140.46
  6. Step 6: Final answer
    x = 128,676.90

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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.