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Finding the Fourth Proportional to 138,615.60, 194,455.50 and 138,615.60

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Solution

The fourth proportional to 138,615.60, 194,455.50 and 138,615.60 is: 194,455.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,615.60 : 194,455.50 = 138,615.60 : x
  2. Step 2: Convert to fraction form
    138,615.60/194,455.50 = 138,615.60/x
  3. Step 3: Cross multiply
    138,615.60x = 194,455.50 × 138,615.60
  4. Step 4: Simplify right side
    138,615.60x = 26,954,565,805.80
  5. Step 5: Solve for x
    x = 26,954,565,805.80/138,615.60
  6. Step 6: Final answer
    x = 194,455.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.