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Finding the Fourth Proportional to 153,448.44, 211,736.79 and 85,455.96

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Solution

The fourth proportional to 153,448.44, 211,736.79 and 85,455.96 is: 117,916.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,448.44 : 211,736.79 = 85,455.96 : x
  2. Step 2: Convert to fraction form
    153,448.44/211,736.79 = 85,455.96/x
  3. Step 3: Cross multiply
    153,448.44x = 211,736.79 × 85,455.96
  4. Step 4: Simplify right side
    153,448.44x = 18,094,170,656.77
  5. Step 5: Solve for x
    x = 18,094,170,656.77/153,448.44
  6. Step 6: Final answer
    x = 117,916.94

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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.