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Finding the Fourth Proportional to 71,707.20, 107,494.56 and 38,450.40

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Solution

The fourth proportional to 71,707.20, 107,494.56 and 38,450.40 is: 57,640.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,707.20 : 107,494.56 = 38,450.40 : x
  2. Step 2: Convert to fraction form
    71,707.20/107,494.56 = 38,450.40/x
  3. Step 3: Cross multiply
    71,707.20x = 107,494.56 × 38,450.40
  4. Step 4: Simplify right side
    71,707.20x = 4,133,208,829.82
  5. Step 5: Solve for x
    x = 4,133,208,829.82/71,707.20
  6. Step 6: Final answer
    x = 57,640.08

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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.