Home / 118,947.40-178,421.10-105,814.60

Finding the Fourth Proportional to 118,947.40, 178,421.10 and 105,814.60

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Solution

The fourth proportional to 118,947.40, 178,421.10 and 105,814.60 is: 158,721.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,947.40 : 178,421.10 = 105,814.60 : x
  2. Step 2: Convert to fraction form
    118,947.40/178,421.10 = 105,814.60/x
  3. Step 3: Cross multiply
    118,947.40x = 178,421.10 × 105,814.60
  4. Step 4: Simplify right side
    118,947.40x = 18,879,557,328.06
  5. Step 5: Solve for x
    x = 18,879,557,328.06/118,947.40
  6. Step 6: Final answer
    x = 158,721.90

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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.