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Finding the Fourth Proportional to 74,900.99, 103,365.82 and 40,911.48

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Solution

The fourth proportional to 74,900.99, 103,365.82 and 40,911.48 is: 56,459.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,900.99 : 103,365.82 = 40,911.48 : x
  2. Step 2: Convert to fraction form
    74,900.99/103,365.82 = 40,911.48/x
  3. Step 3: Cross multiply
    74,900.99x = 103,365.82 × 40,911.48
  4. Step 4: Simplify right side
    74,900.99x = 4,228,848,728.75
  5. Step 5: Solve for x
    x = 4,228,848,728.75/74,900.99
  6. Step 6: Final answer
    x = 56,459.18

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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.