Home / 100,120.16-138,160.19-54,798.05

Finding the Fourth Proportional to 100,120.16, 138,160.19 and 54,798.05

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Solution

The fourth proportional to 100,120.16, 138,160.19 and 54,798.05 is: 75,618.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,120.16 : 138,160.19 = 54,798.05 : x
  2. Step 2: Convert to fraction form
    100,120.16/138,160.19 = 54,798.05/x
  3. Step 3: Cross multiply
    100,120.16x = 138,160.19 × 54,798.05
  4. Step 4: Simplify right side
    100,120.16x = 7,570,908,999.63
  5. Step 5: Solve for x
    x = 7,570,908,999.63/100,120.16
  6. Step 6: Final answer
    x = 75,618.23

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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.