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Finding the Fourth Proportional to 102,979, 142,113.18 and 58,267

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Solution

The fourth proportional to 102,979, 142,113.18 and 58,267 is: 80,409.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,979 : 142,113.18 = 58,267 : x
  2. Step 2: Convert to fraction form
    102,979/142,113.18 = 58,267/x
  3. Step 3: Cross multiply
    102,979x = 142,113.18 × 58,267
  4. Step 4: Simplify right side
    102,979x = 8,280,508,659.06
  5. Step 5: Solve for x
    x = 8,280,508,659.06/102,979
  6. Step 6: Final answer
    x = 80,409.68

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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.