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Finding the Fourth Proportional to 260,194.77, 390,318.11 and 70,658.21

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Solution

The fourth proportional to 260,194.77, 390,318.11 and 70,658.21 is: 105,994.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,194.77 : 390,318.11 = 70,658.21 : x
  2. Step 2: Convert to fraction form
    260,194.77/390,318.11 = 70,658.21/x
  3. Step 3: Cross multiply
    260,194.77x = 390,318.11 × 70,658.21
  4. Step 4: Simplify right side
    260,194.77x = 27,579,178,983.18
  5. Step 5: Solve for x
    x = 27,579,178,983.18/260,194.77
  6. Step 6: Final answer
    x = 105,994.36

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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.