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Finding the Fourth Proportional to 93,668.66, 139,835.31 and 90,387.38

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Solution

The fourth proportional to 93,668.66, 139,835.31 and 90,387.38 is: 134,936.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,668.66 : 139,835.31 = 90,387.38 : x
  2. Step 2: Convert to fraction form
    93,668.66/139,835.31 = 90,387.38/x
  3. Step 3: Cross multiply
    93,668.66x = 139,835.31 × 90,387.38
  4. Step 4: Simplify right side
    93,668.66x = 12,639,346,850.45
  5. Step 5: Solve for x
    x = 12,639,346,850.45/93,668.66
  6. Step 6: Final answer
    x = 134,936.77

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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.