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Finding the Fourth Proportional to 153,091.86, 211,369.86 and 136,908.96

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Solution

The fourth proportional to 153,091.86, 211,369.86 and 136,908.96 is: 189,026.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,091.86 : 211,369.86 = 136,908.96 : x
  2. Step 2: Convert to fraction form
    153,091.86/211,369.86 = 136,908.96/x
  3. Step 3: Cross multiply
    153,091.86x = 211,369.86 × 136,908.96
  4. Step 4: Simplify right side
    153,091.86x = 28,938,427,707.95
  5. Step 5: Solve for x
    x = 28,938,427,707.95/153,091.86
  6. Step 6: Final answer
    x = 189,026.56

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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.