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Finding the Fourth Proportional to 119,485, 164,870 and 68,488.34

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Solution

The fourth proportional to 119,485, 164,870 and 68,488.34 is: 94,502.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,485 : 164,870 = 68,488.34 : x
  2. Step 2: Convert to fraction form
    119,485/164,870 = 68,488.34/x
  3. Step 3: Cross multiply
    119,485x = 164,870 × 68,488.34
  4. Step 4: Simplify right side
    119,485x = 11,291,672,615.80
  5. Step 5: Solve for x
    x = 11,291,672,615.80/119,485
  6. Step 6: Final answer
    x = 94,502.85

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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.