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Finding the Fourth Proportional to 85,670.70, 118,208.82 and 53,821.20

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Solution

The fourth proportional to 85,670.70, 118,208.82 and 53,821.20 is: 74,262.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,670.70 : 118,208.82 = 53,821.20 : x
  2. Step 2: Convert to fraction form
    85,670.70/118,208.82 = 53,821.20/x
  3. Step 3: Cross multiply
    85,670.70x = 118,208.82 × 53,821.20
  4. Step 4: Simplify right side
    85,670.70x = 6,362,140,542.98
  5. Step 5: Solve for x
    x = 6,362,140,542.98/85,670.70
  6. Step 6: Final answer
    x = 74,262.74

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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.