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Finding the Fourth Proportional to 571,407.88, 857,103.08 and 139,129.36

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Solution

The fourth proportional to 571,407.88, 857,103.08 and 139,129.36 is: 208,691.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,407.88 : 857,103.08 = 139,129.36 : x
  2. Step 2: Convert to fraction form
    571,407.88/857,103.08 = 139,129.36/x
  3. Step 3: Cross multiply
    571,407.88x = 857,103.08 × 139,129.36
  4. Step 4: Simplify right side
    571,407.88x = 119,248,202,974.43
  5. Step 5: Solve for x
    x = 119,248,202,974.43/571,407.88
  6. Step 6: Final answer
    x = 208,691.91

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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.