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Finding the Fourth Proportional to 153,932.64, 212,462.46 and 90,290.94

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Solution

The fourth proportional to 153,932.64, 212,462.46 and 90,290.94 is: 124,622.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,932.64 : 212,462.46 = 90,290.94 : x
  2. Step 2: Convert to fraction form
    153,932.64/212,462.46 = 90,290.94/x
  3. Step 3: Cross multiply
    153,932.64x = 212,462.46 × 90,290.94
  4. Step 4: Simplify right side
    153,932.64x = 19,183,435,228.11
  5. Step 5: Solve for x
    x = 19,183,435,228.11/153,932.64
  6. Step 6: Final answer
    x = 124,622.27

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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.