Home / 100,433.65-138,607.20-55,120.38

Finding the Fourth Proportional to 100,433.65, 138,607.20 and 55,120.38

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Solution

The fourth proportional to 100,433.65, 138,607.20 and 55,120.38 is: 76,070.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,433.65 : 138,607.20 = 55,120.38 : x
  2. Step 2: Convert to fraction form
    100,433.65/138,607.20 = 55,120.38/x
  3. Step 3: Cross multiply
    100,433.65x = 138,607.20 × 55,120.38
  4. Step 4: Simplify right side
    100,433.65x = 7,640,080,841.70
  5. Step 5: Solve for x
    x = 7,640,080,841.70/100,433.65
  6. Step 6: Final answer
    x = 76,070.93

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1.5x scale

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.