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Finding the Fourth Proportional to 121,215.34, 181,622.53 and 61,969.51

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Solution

The fourth proportional to 121,215.34, 181,622.53 and 61,969.51 is: 92,851.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,215.34 : 181,622.53 = 61,969.51 : x
  2. Step 2: Convert to fraction form
    121,215.34/181,622.53 = 61,969.51/x
  3. Step 3: Cross multiply
    121,215.34x = 181,622.53 × 61,969.51
  4. Step 4: Simplify right side
    121,215.34x = 11,255,059,189.06
  5. Step 5: Solve for x
    x = 11,255,059,189.06/121,215.34
  6. Step 6: Final answer
    x = 92,851.77

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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.