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Finding the Fourth Proportional to 153,804.20, 212,250.31 and 85,819.93

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Solution

The fourth proportional to 153,804.20, 212,250.31 and 85,819.93 is: 118,431.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,804.20 : 212,250.31 = 85,819.93 : x
  2. Step 2: Convert to fraction form
    153,804.20/212,250.31 = 85,819.93/x
  3. Step 3: Cross multiply
    153,804.20x = 212,250.31 × 85,819.93
  4. Step 4: Simplify right side
    153,804.20x = 18,215,306,746.68
  5. Step 5: Solve for x
    x = 18,215,306,746.68/153,804.20
  6. Step 6: Final answer
    x = 118,431.79

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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.