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Finding the Fourth Proportional to 221,762, 306,038.28 and 121,166.48

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Solution

The fourth proportional to 221,762, 306,038.28 and 121,166.48 is: 167,213.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,762 : 306,038.28 = 121,166.48 : x
  2. Step 2: Convert to fraction form
    221,762/306,038.28 = 121,166.48/x
  3. Step 3: Cross multiply
    221,762x = 306,038.28 × 121,166.48
  4. Step 4: Simplify right side
    221,762x = 37,081,581,132.85
  5. Step 5: Solve for x
    x = 37,081,581,132.85/221,762
  6. Step 6: Final answer
    x = 167,213.41

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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.