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Finding the Fourth Proportional to 121,763.30, 167,924.56 and 76,445.51

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Solution

The fourth proportional to 121,763.30, 167,924.56 and 76,445.51 is: 105,426.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,763.30 : 167,924.56 = 76,445.51 : x
  2. Step 2: Convert to fraction form
    121,763.30/167,924.56 = 76,445.51/x
  3. Step 3: Cross multiply
    121,763.30x = 167,924.56 × 76,445.51
  4. Step 4: Simplify right side
    121,763.30x = 12,837,078,248.50
  5. Step 5: Solve for x
    x = 12,837,078,248.50/121,763.30
  6. Step 6: Final answer
    x = 105,426.50

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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.