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Finding the Fourth Proportional to 128,924.40, 193,211.40 and 48,919.35

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Solution

The fourth proportional to 128,924.40, 193,211.40 and 48,919.35 is: 73,312.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,924.40 : 193,211.40 = 48,919.35 : x
  2. Step 2: Convert to fraction form
    128,924.40/193,211.40 = 48,919.35/x
  3. Step 3: Cross multiply
    128,924.40x = 193,211.40 × 48,919.35
  4. Step 4: Simplify right side
    128,924.40x = 9,451,776,733.41
  5. Step 5: Solve for x
    x = 9,451,776,733.41/128,924.40
  6. Step 6: Final answer
    x = 73,312.55

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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.