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Finding the Fourth Proportional to 100,528.74, 138,740.74 and 57,512.23

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Solution

The fourth proportional to 100,528.74, 138,740.74 and 57,512.23 is: 79,373.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,528.74 : 138,740.74 = 57,512.23 : x
  2. Step 2: Convert to fraction form
    100,528.74/138,740.74 = 57,512.23/x
  3. Step 3: Cross multiply
    100,528.74x = 138,740.74 × 57,512.23
  4. Step 4: Simplify right side
    100,528.74x = 7,979,288,858.62
  5. Step 5: Solve for x
    x = 7,979,288,858.62/100,528.74
  6. Step 6: Final answer
    x = 79,373.21

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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.