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Finding the Fourth Proportional to 128,424.60, 192,657.48 and 39,657.24

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Solution

The fourth proportional to 128,424.60, 192,657.48 and 39,657.24 is: 59,492.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,424.60 : 192,657.48 = 39,657.24 : x
  2. Step 2: Convert to fraction form
    128,424.60/192,657.48 = 39,657.24/x
  3. Step 3: Cross multiply
    128,424.60x = 192,657.48 × 39,657.24
  4. Step 4: Simplify right side
    128,424.60x = 7,640,263,922.16
  5. Step 5: Solve for x
    x = 7,640,263,922.16/128,424.60
  6. Step 6: Final answer
    x = 59,492.22

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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.