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Finding the Fourth Proportional to 259,883.52, 389,831.04 and 72,890.88

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Solution

The fourth proportional to 259,883.52, 389,831.04 and 72,890.88 is: 109,337.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,883.52 : 389,831.04 = 72,890.88 : x
  2. Step 2: Convert to fraction form
    259,883.52/389,831.04 = 72,890.88/x
  3. Step 3: Cross multiply
    259,883.52x = 389,831.04 × 72,890.88
  4. Step 4: Simplify right side
    259,883.52x = 28,415,127,556.92
  5. Step 5: Solve for x
    x = 28,415,127,556.92/259,883.52
  6. Step 6: Final answer
    x = 109,337.94

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1.5x scale

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.