Home / 117,621.12-162,206.46-90,721.02

Finding the Fourth Proportional to 117,621.12, 162,206.46 and 90,721.02

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Solution

The fourth proportional to 117,621.12, 162,206.46 and 90,721.02 is: 125,109.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,621.12 : 162,206.46 = 90,721.02 : x
  2. Step 2: Convert to fraction form
    117,621.12/162,206.46 = 90,721.02/x
  3. Step 3: Cross multiply
    117,621.12x = 162,206.46 × 90,721.02
  4. Step 4: Simplify right side
    117,621.12x = 14,715,535,501.79
  5. Step 5: Solve for x
    x = 14,715,535,501.79/117,621.12
  6. Step 6: Final answer
    x = 125,109.64

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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.