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Finding the Fourth Proportional to 71,897.40, 107,955.45 and 55,276.20

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Solution

The fourth proportional to 71,897.40, 107,955.45 and 55,276.20 is: 82,998.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,897.40 : 107,955.45 = 55,276.20 : x
  2. Step 2: Convert to fraction form
    71,897.40/107,955.45 = 55,276.20/x
  3. Step 3: Cross multiply
    71,897.40x = 107,955.45 × 55,276.20
  4. Step 4: Simplify right side
    71,897.40x = 5,967,367,045.29
  5. Step 5: Solve for x
    x = 5,967,367,045.29/71,897.40
  6. Step 6: Final answer
    x = 82,998.37

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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.