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Finding the Fourth Proportional to 121,410.90, 182,051.55 and 51,210.90

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Solution

The fourth proportional to 121,410.90, 182,051.55 and 51,210.90 is: 76,789.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,410.90 : 182,051.55 = 51,210.90 : x
  2. Step 2: Convert to fraction form
    121,410.90/182,051.55 = 51,210.90/x
  3. Step 3: Cross multiply
    121,410.90x = 182,051.55 × 51,210.90
  4. Step 4: Simplify right side
    121,410.90x = 9,323,023,721.90
  5. Step 5: Solve for x
    x = 9,323,023,721.90/121,410.90
  6. Step 6: Final answer
    x = 76,789.02

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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.