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Finding the Fourth Proportional to 424,134.36, 636,066.54 and 139,771.91

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Solution

The fourth proportional to 424,134.36, 636,066.54 and 139,771.91 is: 209,613.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,134.36 : 636,066.54 = 139,771.91 : x
  2. Step 2: Convert to fraction form
    424,134.36/636,066.54 = 139,771.91/x
  3. Step 3: Cross multiply
    424,134.36x = 636,066.54 × 139,771.91
  4. Step 4: Simplify right side
    424,134.36x = 88,904,236,773.06
  5. Step 5: Solve for x
    x = 88,904,236,773.06/424,134.36
  6. Step 6: Final answer
    x = 209,613.38

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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.