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Finding the Fourth Proportional to 102,635.80, 153,807.90 and 71,434.60

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Solution

The fourth proportional to 102,635.80, 153,807.90 and 71,434.60 is: 107,050.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,635.80 : 153,807.90 = 71,434.60 : x
  2. Step 2: Convert to fraction form
    102,635.80/153,807.90 = 71,434.60/x
  3. Step 3: Cross multiply
    102,635.80x = 153,807.90 × 71,434.60
  4. Step 4: Simplify right side
    102,635.80x = 10,987,205,813.34
  5. Step 5: Solve for x
    x = 10,987,205,813.34/102,635.80
  6. Step 6: Final answer
    x = 107,050.42

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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.