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Finding the Fourth Proportional to 316,662.66, 474,942.96 and 139,136.58

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Solution

The fourth proportional to 316,662.66, 474,942.96 and 139,136.58 is: 208,682.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,662.66 : 474,942.96 = 139,136.58 : x
  2. Step 2: Convert to fraction form
    316,662.66/474,942.96 = 139,136.58/x
  3. Step 3: Cross multiply
    316,662.66x = 474,942.96 × 139,136.58
  4. Step 4: Simplify right side
    316,662.66x = 66,081,939,149.48
  5. Step 5: Solve for x
    x = 66,081,939,149.48/316,662.66
  6. Step 6: Final answer
    x = 208,682.45

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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.