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Finding the Fourth Proportional to 90,858, 136,291.86 and 28,533.36

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Solution

The fourth proportional to 90,858, 136,291.86 and 28,533.36 is: 42,801.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,858 : 136,291.86 = 28,533.36 : x
  2. Step 2: Convert to fraction form
    90,858/136,291.86 = 28,533.36/x
  3. Step 3: Cross multiply
    90,858x = 136,291.86 × 28,533.36
  4. Step 4: Simplify right side
    90,858x = 3,888,864,706.45
  5. Step 5: Solve for x
    x = 3,888,864,706.45/90,858
  6. Step 6: Final answer
    x = 42,801.57

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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.