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Finding the Fourth Proportional to 121,429.40, 182,064.90 and 108,987.80

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Solution

The fourth proportional to 121,429.40, 182,064.90 and 108,987.80 is: 163,410.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,429.40 : 182,064.90 = 108,987.80 : x
  2. Step 2: Convert to fraction form
    121,429.40/182,064.90 = 108,987.80/x
  3. Step 3: Cross multiply
    121,429.40x = 182,064.90 × 108,987.80
  4. Step 4: Simplify right side
    121,429.40x = 19,842,852,908.22
  5. Step 5: Solve for x
    x = 19,842,852,908.22/121,429.40
  6. Step 6: Final answer
    x = 163,410.61

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1.5x scale

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.