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Finding the Fourth Proportional to 128,307.31, 192,448.60 and 39,536.98

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Solution

The fourth proportional to 128,307.31, 192,448.60 and 39,536.98 is: 59,301.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,307.31 : 192,448.60 = 39,536.98 : x
  2. Step 2: Convert to fraction form
    128,307.31/192,448.60 = 39,536.98/x
  3. Step 3: Cross multiply
    128,307.31x = 192,448.60 × 39,536.98
  4. Step 4: Simplify right side
    128,307.31x = 7,608,836,590.95
  5. Step 5: Solve for x
    x = 7,608,836,590.95/128,307.31
  6. Step 6: Final answer
    x = 59,301.66

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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.