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Finding the Fourth Proportional to 103,216.55, 142,415.21 and 57,892.79

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Solution

The fourth proportional to 103,216.55, 142,415.21 and 57,892.79 is: 79,878.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,216.55 : 142,415.21 = 57,892.79 : x
  2. Step 2: Convert to fraction form
    103,216.55/142,415.21 = 57,892.79/x
  3. Step 3: Cross multiply
    103,216.55x = 142,415.21 × 57,892.79
  4. Step 4: Simplify right side
    103,216.55x = 8,244,814,346.11
  5. Step 5: Solve for x
    x = 8,244,814,346.11/103,216.55
  6. Step 6: Final answer
    x = 79,878.81

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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.