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Finding the Fourth Proportional to 74,783.70, 103,203.81 and 42,958.98

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Solution

The fourth proportional to 74,783.70, 103,203.81 and 42,958.98 is: 59,284.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,783.70 : 103,203.81 = 42,958.98 : x
  2. Step 2: Convert to fraction form
    74,783.70/103,203.81 = 42,958.98/x
  3. Step 3: Cross multiply
    74,783.70x = 103,203.81 × 42,958.98
  4. Step 4: Simplify right side
    74,783.70x = 4,433,530,409.71
  5. Step 5: Solve for x
    x = 4,433,530,409.71/74,783.70
  6. Step 6: Final answer
    x = 59,284.72

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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.