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Finding the Fourth Proportional to 265,900.01, 398,849.79 and 78,911.51

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Solution

The fourth proportional to 265,900.01, 398,849.79 and 78,911.51 is: 118,367.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,900.01 : 398,849.79 = 78,911.51 : x
  2. Step 2: Convert to fraction form
    265,900.01/398,849.79 = 78,911.51/x
  3. Step 3: Cross multiply
    265,900.01x = 398,849.79 × 78,911.51
  4. Step 4: Simplify right side
    265,900.01x = 31,473,837,197.83
  5. Step 5: Solve for x
    x = 31,473,837,197.83/265,900.01
  6. Step 6: Final answer
    x = 118,367.19

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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.