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Finding the Fourth Proportional to 142,730.74, 196,959.90 and 79,063.93

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Solution

The fourth proportional to 142,730.74, 196,959.90 and 79,063.93 is: 109,103.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,730.74 : 196,959.90 = 79,063.93 : x
  2. Step 2: Convert to fraction form
    142,730.74/196,959.90 = 79,063.93/x
  3. Step 3: Cross multiply
    142,730.74x = 196,959.90 × 79,063.93
  4. Step 4: Simplify right side
    142,730.74x = 15,572,423,746.41
  5. Step 5: Solve for x
    x = 15,572,423,746.41/142,730.74
  6. Step 6: Final answer
    x = 109,103.50

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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.