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Finding the Fourth Proportional to 353,021.94, 529,366.59 and 128,223.86

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Solution

The fourth proportional to 353,021.94, 529,366.59 and 128,223.86 is: 192,275.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,021.94 : 529,366.59 = 128,223.86 : x
  2. Step 2: Convert to fraction form
    353,021.94/529,366.59 = 128,223.86/x
  3. Step 3: Cross multiply
    353,021.94x = 529,366.59 × 128,223.86
  4. Step 4: Simplify right side
    353,021.94x = 67,877,424,878.00
  5. Step 5: Solve for x
    x = 67,877,424,878.00/353,021.94
  6. Step 6: Final answer
    x = 192,275.37

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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.