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Finding the Fourth Proportional to 128,573.55, 192,933.24 and 69,407.91

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Solution

The fourth proportional to 128,573.55, 192,933.24 and 69,407.91 is: 104,151.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,573.55 : 192,933.24 = 69,407.91 : x
  2. Step 2: Convert to fraction form
    128,573.55/192,933.24 = 69,407.91/x
  3. Step 3: Cross multiply
    128,573.55x = 192,933.24 × 69,407.91
  4. Step 4: Simplify right side
    128,573.55x = 13,391,092,957.93
  5. Step 5: Solve for x
    x = 13,391,092,957.93/128,573.55
  6. Step 6: Final answer
    x = 104,151.23

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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.