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Finding the Fourth Proportional to 121,409.40, 182,502.90 and 86,590.20

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Solution

The fourth proportional to 121,409.40, 182,502.90 and 86,590.20 is: 130,162.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,409.40 : 182,502.90 = 86,590.20 : x
  2. Step 2: Convert to fraction form
    121,409.40/182,502.90 = 86,590.20/x
  3. Step 3: Cross multiply
    121,409.40x = 182,502.90 × 86,590.20
  4. Step 4: Simplify right side
    121,409.40x = 15,802,962,611.58
  5. Step 5: Solve for x
    x = 15,802,962,611.58/121,409.40
  6. Step 6: Final answer
    x = 130,162.60

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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.