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Finding the Fourth Proportional to 158,441.80, 218,648.40 and 86,821.63

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Solution

The fourth proportional to 158,441.80, 218,648.40 and 86,821.63 is: 119,813.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,441.80 : 218,648.40 = 86,821.63 : x
  2. Step 2: Convert to fraction form
    158,441.80/218,648.40 = 86,821.63/x
  3. Step 3: Cross multiply
    158,441.80x = 218,648.40 × 86,821.63
  4. Step 4: Simplify right side
    158,441.80x = 18,983,410,484.89
  5. Step 5: Solve for x
    x = 18,983,410,484.89/158,441.80
  6. Step 6: Final answer
    x = 119,813.15

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1.5x scale

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.