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Finding the Fourth Proportional to 571,382.72, 857,064.54 and 139,104.74

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Solution

The fourth proportional to 571,382.72, 857,064.54 and 139,104.74 is: 208,654.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,382.72 : 857,064.54 = 139,104.74 : x
  2. Step 2: Convert to fraction form
    571,382.72/857,064.54 = 139,104.74/x
  3. Step 3: Cross multiply
    571,382.72x = 857,064.54 × 139,104.74
  4. Step 4: Simplify right side
    571,382.72x = 119,221,739,999.92
  5. Step 5: Solve for x
    x = 119,221,739,999.92/571,382.72
  6. Step 6: Final answer
    x = 208,654.79

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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.