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Finding the Fourth Proportional to 135,978.32, 186,984.60 and 118,041.96

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Solution

The fourth proportional to 135,978.32, 186,984.60 and 118,041.96 is: 162,320.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,978.32 : 186,984.60 = 118,041.96 : x
  2. Step 2: Convert to fraction form
    135,978.32/186,984.60 = 118,041.96/x
  3. Step 3: Cross multiply
    135,978.32x = 186,984.60 × 118,041.96
  4. Step 4: Simplify right side
    135,978.32x = 22,072,028,673.82
  5. Step 5: Solve for x
    x = 22,072,028,673.82/135,978.32
  6. Step 6: Final answer
    x = 162,320.20

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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.