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Finding the Fourth Proportional to 128,923.68, 193,384.74 and 70,132.98

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Solution

The fourth proportional to 128,923.68, 193,384.74 and 70,132.98 is: 105,199.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,923.68 : 193,384.74 = 70,132.98 : x
  2. Step 2: Convert to fraction form
    128,923.68/193,384.74 = 70,132.98/x
  3. Step 3: Cross multiply
    128,923.68x = 193,384.74 × 70,132.98
  4. Step 4: Simplify right side
    128,923.68x = 13,562,648,102.73
  5. Step 5: Solve for x
    x = 13,562,648,102.73/128,923.68
  6. Step 6: Final answer
    x = 105,199.05

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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.