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Finding the Fourth Proportional to 138,245.88, 207,479.54 and 71,705.08

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Solution

The fourth proportional to 138,245.88, 207,479.54 and 71,705.08 is: 107,615.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,245.88 : 207,479.54 = 71,705.08 : x
  2. Step 2: Convert to fraction form
    138,245.88/207,479.54 = 71,705.08/x
  3. Step 3: Cross multiply
    138,245.88x = 207,479.54 × 71,705.08
  4. Step 4: Simplify right side
    138,245.88x = 14,877,337,014.06
  5. Step 5: Solve for x
    x = 14,877,337,014.06/138,245.88
  6. Step 6: Final answer
    x = 107,615.05

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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.