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Finding the Fourth Proportional to 142,686.56, 196,913.36 and 79,024.40

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Solution

The fourth proportional to 142,686.56, 196,913.36 and 79,024.40 is: 109,056.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,686.56 : 196,913.36 = 79,024.40 : x
  2. Step 2: Convert to fraction form
    142,686.56/196,913.36 = 79,024.40/x
  3. Step 3: Cross multiply
    142,686.56x = 196,913.36 × 79,024.40
  4. Step 4: Simplify right side
    142,686.56x = 15,560,960,125.98
  5. Step 5: Solve for x
    x = 15,560,960,125.98/142,686.56
  6. Step 6: Final answer
    x = 109,056.94

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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.