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Finding the Fourth Proportional to 571,391.72, 857,078.04 and 139,113.74

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Solution

The fourth proportional to 571,391.72, 857,078.04 and 139,113.74 is: 208,668.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,391.72 : 857,078.04 = 139,113.74 : x
  2. Step 2: Convert to fraction form
    571,391.72/857,078.04 = 139,113.74/x
  3. Step 3: Cross multiply
    571,391.72x = 857,078.04 × 139,113.74
  4. Step 4: Simplify right side
    571,391.72x = 119,231,331,616.27
  5. Step 5: Solve for x
    x = 119,231,331,616.27/571,391.72
  6. Step 6: Final answer
    x = 208,668.29

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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.