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Finding the Fourth Proportional to 71,536.40, 107,212.80 and 39,946.40

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Solution

The fourth proportional to 71,536.40, 107,212.80 and 39,946.40 is: 59,868.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,536.40 : 107,212.80 = 39,946.40 : x
  2. Step 2: Convert to fraction form
    71,536.40/107,212.80 = 39,946.40/x
  3. Step 3: Cross multiply
    71,536.40x = 107,212.80 × 39,946.40
  4. Step 4: Simplify right side
    71,536.40x = 4,282,765,393.92
  5. Step 5: Solve for x
    x = 4,282,765,393.92/71,536.40
  6. Step 6: Final answer
    x = 59,868.34

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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.