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Finding the Fourth Proportional to 153,776.21, 212,211.48 and 85,791.48

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Solution

The fourth proportional to 153,776.21, 212,211.48 and 85,791.48 is: 118,392.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,776.21 : 212,211.48 = 85,791.48 : x
  2. Step 2: Convert to fraction form
    153,776.21/212,211.48 = 85,791.48/x
  3. Step 3: Cross multiply
    153,776.21x = 212,211.48 × 85,791.48
  4. Step 4: Simplify right side
    153,776.21x = 18,205,936,942.19
  5. Step 5: Solve for x
    x = 18,205,936,942.19/153,776.21
  6. Step 6: Final answer
    x = 118,392.42

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1.5x scale

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.