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Finding the Fourth Proportional to 128,152.91, 192,270.50 and 61,597.87

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Solution

The fourth proportional to 128,152.91, 192,270.50 and 61,597.87 is: 92,416.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,152.91 : 192,270.50 = 61,597.87 : x
  2. Step 2: Convert to fraction form
    128,152.91/192,270.50 = 61,597.87/x
  3. Step 3: Cross multiply
    128,152.91x = 192,270.50 × 61,597.87
  4. Step 4: Simplify right side
    128,152.91x = 11,843,453,263.84
  5. Step 5: Solve for x
    x = 11,843,453,263.84/128,152.91
  6. Step 6: Final answer
    x = 92,416.58

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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.