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Finding the Fourth Proportional to 257,370.95, 386,107.46 and 79,870.39

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Solution

The fourth proportional to 257,370.95, 386,107.46 and 79,870.39 is: 119,821.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,370.95 : 386,107.46 = 79,870.39 : x
  2. Step 2: Convert to fraction form
    257,370.95/386,107.46 = 79,870.39/x
  3. Step 3: Cross multiply
    257,370.95x = 386,107.46 × 79,870.39
  4. Step 4: Simplify right side
    257,370.95x = 30,838,553,412.11
  5. Step 5: Solve for x
    x = 30,838,553,412.11/257,370.95
  6. Step 6: Final answer
    x = 119,821.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.