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Finding the Fourth Proportional to 142,993.15, 197,330.79 and 79,330.93

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Solution

The fourth proportional to 142,993.15, 197,330.79 and 79,330.93 is: 109,476.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,993.15 : 197,330.79 = 79,330.93 : x
  2. Step 2: Convert to fraction form
    142,993.15/197,330.79 = 79,330.93/x
  3. Step 3: Cross multiply
    142,993.15x = 197,330.79 × 79,330.93
  4. Step 4: Simplify right side
    142,993.15x = 15,654,435,088.33
  5. Step 5: Solve for x
    x = 15,654,435,088.33/142,993.15
  6. Step 6: Final answer
    x = 109,476.82

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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.