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Finding the Fourth Proportional to 65,626.47, 90,604.58 and 40,509.99

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Solution

The fourth proportional to 65,626.47, 90,604.58 and 40,509.99 is: 55,928.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,626.47 : 90,604.58 = 40,509.99 : x
  2. Step 2: Convert to fraction form
    65,626.47/90,604.58 = 40,509.99/x
  3. Step 3: Cross multiply
    65,626.47x = 90,604.58 × 40,509.99
  4. Step 4: Simplify right side
    65,626.47x = 3,670,390,427.20
  5. Step 5: Solve for x
    x = 3,670,390,427.20/65,626.47
  6. Step 6: Final answer
    x = 55,928.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.