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Finding the Fourth Proportional to 105,297.80, 145,310.96 and 57,551.12

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Solution

The fourth proportional to 105,297.80, 145,310.96 and 57,551.12 is: 79,420.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,297.80 : 145,310.96 = 57,551.12 : x
  2. Step 2: Convert to fraction form
    105,297.80/145,310.96 = 57,551.12/x
  3. Step 3: Cross multiply
    105,297.80x = 145,310.96 × 57,551.12
  4. Step 4: Simplify right side
    105,297.80x = 8,362,808,496.28
  5. Step 5: Solve for x
    x = 8,362,808,496.28/105,297.80
  6. Step 6: Final answer
    x = 79,420.54

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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.