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Finding the Fourth Proportional to 153,938.82, 212,375.61 and 103,671.30

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Solution

The fourth proportional to 153,938.82, 212,375.61 and 103,671.30 is: 143,026.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,938.82 : 212,375.61 = 103,671.30 : x
  2. Step 2: Convert to fraction form
    153,938.82/212,375.61 = 103,671.30/x
  3. Step 3: Cross multiply
    153,938.82x = 212,375.61 × 103,671.30
  4. Step 4: Simplify right side
    153,938.82x = 22,017,255,576.99
  5. Step 5: Solve for x
    x = 22,017,255,576.99/153,938.82
  6. Step 6: Final answer
    x = 143,026.01

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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.