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Finding the Fourth Proportional to 142,989.40, 197,349.06 and 79,347.64

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Solution

The fourth proportional to 142,989.40, 197,349.06 and 79,347.64 is: 109,512.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,989.40 : 197,349.06 = 79,347.64 : x
  2. Step 2: Convert to fraction form
    142,989.40/197,349.06 = 79,347.64/x
  3. Step 3: Cross multiply
    142,989.40x = 197,349.06 × 79,347.64
  4. Step 4: Simplify right side
    142,989.40x = 15,659,182,167.22
  5. Step 5: Solve for x
    x = 15,659,182,167.22/142,989.40
  6. Step 6: Final answer
    x = 109,512.89

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.