Home / 121,038.20-181,338.60-98,730.80

Finding the Fourth Proportional to 121,038.20, 181,338.60 and 98,730.80

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Solution

The fourth proportional to 121,038.20, 181,338.60 and 98,730.80 is: 147,917.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,038.20 : 181,338.60 = 98,730.80 : x
  2. Step 2: Convert to fraction form
    121,038.20/181,338.60 = 98,730.80/x
  3. Step 3: Cross multiply
    121,038.20x = 181,338.60 × 98,730.80
  4. Step 4: Simplify right side
    121,038.20x = 17,903,705,048.88
  5. Step 5: Solve for x
    x = 17,903,705,048.88/121,038.20
  6. Step 6: Final answer
    x = 147,917.81

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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.