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Finding the Fourth Proportional to 128,572.86, 192,859.26 and 58,472.22

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Solution

The fourth proportional to 128,572.86, 192,859.26 and 58,472.22 is: 87,708.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,572.86 : 192,859.26 = 58,472.22 : x
  2. Step 2: Convert to fraction form
    128,572.86/192,859.26 = 58,472.22/x
  3. Step 3: Cross multiply
    128,572.86x = 192,859.26 × 58,472.22
  4. Step 4: Simplify right side
    128,572.86x = 11,276,909,079.76
  5. Step 5: Solve for x
    x = 11,276,909,079.76/128,572.86
  6. Step 6: Final answer
    x = 87,708.32

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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.