Home / 121,809.20-168,092.88-70,826

Finding the Fourth Proportional to 121,809.20, 168,092.88 and 70,826

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Solution

The fourth proportional to 121,809.20, 168,092.88 and 70,826 is: 97,737.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,809.20 : 168,092.88 = 70,826 : x
  2. Step 2: Convert to fraction form
    121,809.20/168,092.88 = 70,826/x
  3. Step 3: Cross multiply
    121,809.20x = 168,092.88 × 70,826
  4. Step 4: Simplify right side
    121,809.20x = 11,905,346,318.88
  5. Step 5: Solve for x
    x = 11,905,346,318.88/121,809.20
  6. Step 6: Final answer
    x = 97,737.66

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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.