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Finding the Fourth Proportional to 70,655.91, 105,984.47 and 20,736.82

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Solution

The fourth proportional to 70,655.91, 105,984.47 and 20,736.82 is: 31,105.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,655.91 : 105,984.47 = 20,736.82 : x
  2. Step 2: Convert to fraction form
    70,655.91/105,984.47 = 20,736.82/x
  3. Step 3: Cross multiply
    70,655.91x = 105,984.47 × 20,736.82
  4. Step 4: Simplify right side
    70,655.91x = 2,197,780,877.19
  5. Step 5: Solve for x
    x = 2,197,780,877.19/70,655.91
  6. Step 6: Final answer
    x = 31,105.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.