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Finding the Fourth Proportional to 74,790.46, 103,209.01 and 42,961.40

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Solution

The fourth proportional to 74,790.46, 103,209.01 and 42,961.40 is: 59,285.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,790.46 : 103,209.01 = 42,961.40 : x
  2. Step 2: Convert to fraction form
    74,790.46/103,209.01 = 42,961.40/x
  3. Step 3: Cross multiply
    74,790.46x = 103,209.01 × 42,961.40
  4. Step 4: Simplify right side
    74,790.46x = 4,434,003,562.21
  5. Step 5: Solve for x
    x = 4,434,003,562.21/74,790.46
  6. Step 6: Final answer
    x = 59,285.68

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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.