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Finding the Fourth Proportional to 158,994.39, 219,443.28 and 105,281.67

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Solution

The fourth proportional to 158,994.39, 219,443.28 and 105,281.67 is: 145,309.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,994.39 : 219,443.28 = 105,281.67 : x
  2. Step 2: Convert to fraction form
    158,994.39/219,443.28 = 105,281.67/x
  3. Step 3: Cross multiply
    158,994.39x = 219,443.28 × 105,281.67
  4. Step 4: Simplify right side
    158,994.39x = 23,103,354,988.68
  5. Step 5: Solve for x
    x = 23,103,354,988.68/158,994.39
  6. Step 6: Final answer
    x = 145,309.25

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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.