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Finding the Fourth Proportional to 100,004.94, 138,041.57 and 57,580.38

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Solution

The fourth proportional to 100,004.94, 138,041.57 and 57,580.38 is: 79,480.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,004.94 : 138,041.57 = 57,580.38 : x
  2. Step 2: Convert to fraction form
    100,004.94/138,041.57 = 57,580.38/x
  3. Step 3: Cross multiply
    100,004.94x = 138,041.57 × 57,580.38
  4. Step 4: Simplify right side
    100,004.94x = 7,948,486,200.35
  5. Step 5: Solve for x
    x = 7,948,486,200.35/100,004.94
  6. Step 6: Final answer
    x = 79,480.94

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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.