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Finding the Fourth Proportional to 105,639.40, 158,482.86 and 39,079.54

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Solution

The fourth proportional to 105,639.40, 158,482.86 and 39,079.54 is: 58,628.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,639.40 : 158,482.86 = 39,079.54 : x
  2. Step 2: Convert to fraction form
    105,639.40/158,482.86 = 39,079.54/x
  3. Step 3: Cross multiply
    105,639.40x = 158,482.86 × 39,079.54
  4. Step 4: Simplify right side
    105,639.40x = 6,193,437,266.68
  5. Step 5: Solve for x
    x = 6,193,437,266.68/105,639.40
  6. Step 6: Final answer
    x = 58,628.10

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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.