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Finding the Fourth Proportional to 152,975.36, 211,110.72 and 85,908.80

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Solution

The fourth proportional to 152,975.36, 211,110.72 and 85,908.80 is: 118,556.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,975.36 : 211,110.72 = 85,908.80 : x
  2. Step 2: Convert to fraction form
    152,975.36/211,110.72 = 85,908.80/x
  3. Step 3: Cross multiply
    152,975.36x = 211,110.72 × 85,908.80
  4. Step 4: Simplify right side
    152,975.36x = 18,136,268,622.34
  5. Step 5: Solve for x
    x = 18,136,268,622.34/152,975.36
  6. Step 6: Final answer
    x = 118,556.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.