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Finding the Fourth Proportional to 211,113.99, 316,703.78 and 70,905.42

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Solution

The fourth proportional to 211,113.99, 316,703.78 and 70,905.42 is: 106,369.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,113.99 : 316,703.78 = 70,905.42 : x
  2. Step 2: Convert to fraction form
    211,113.99/316,703.78 = 70,905.42/x
  3. Step 3: Cross multiply
    211,113.99x = 316,703.78 × 70,905.42
  4. Step 4: Simplify right side
    211,113.99x = 22,456,014,536.49
  5. Step 5: Solve for x
    x = 22,456,014,536.49/211,113.99
  6. Step 6: Final answer
    x = 106,369.14

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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.