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Finding the Fourth Proportional to 143,419.53, 215,093.52 and 42,197.45

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Solution

The fourth proportional to 143,419.53, 215,093.52 and 42,197.45 is: 63,285.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,419.53 : 215,093.52 = 42,197.45 : x
  2. Step 2: Convert to fraction form
    143,419.53/215,093.52 = 42,197.45/x
  3. Step 3: Cross multiply
    143,419.53x = 215,093.52 × 42,197.45
  4. Step 4: Simplify right side
    143,419.53x = 9,076,396,980.06
  5. Step 5: Solve for x
    x = 9,076,396,980.06/143,419.53
  6. Step 6: Final answer
    x = 63,285.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.