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Finding the Fourth Proportional to 84,267.90, 126,401.85 and 21,938.40

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Solution

The fourth proportional to 84,267.90, 126,401.85 and 21,938.40 is: 32,907.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,267.90 : 126,401.85 = 21,938.40 : x
  2. Step 2: Convert to fraction form
    84,267.90/126,401.85 = 21,938.40/x
  3. Step 3: Cross multiply
    84,267.90x = 126,401.85 × 21,938.40
  4. Step 4: Simplify right side
    84,267.90x = 2,773,054,346.04
  5. Step 5: Solve for x
    x = 2,773,054,346.04/84,267.90
  6. Step 6: Final answer
    x = 32,907.60

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1.5x scale

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.