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Finding the Fourth Proportional to 71,905.37, 99,408.76 and 53,969.24

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Solution

The fourth proportional to 71,905.37, 99,408.76 and 53,969.24 is: 74,612.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,905.37 : 99,408.76 = 53,969.24 : x
  2. Step 2: Convert to fraction form
    71,905.37/99,408.76 = 53,969.24/x
  3. Step 3: Cross multiply
    71,905.37x = 99,408.76 × 53,969.24
  4. Step 4: Simplify right side
    71,905.37x = 5,365,014,705.07
  5. Step 5: Solve for x
    x = 5,365,014,705.07/71,905.37
  6. Step 6: Final answer
    x = 74,612.16

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1.5x scale

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.