Home / 102,880.47-142,023.58-77,396.56

Finding the Fourth Proportional to 102,880.47, 142,023.58 and 77,396.56

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Solution

The fourth proportional to 102,880.47, 142,023.58 and 77,396.56 is: 106,843.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,880.47 : 142,023.58 = 77,396.56 : x
  2. Step 2: Convert to fraction form
    102,880.47/142,023.58 = 77,396.56/x
  3. Step 3: Cross multiply
    102,880.47x = 142,023.58 × 77,396.56
  4. Step 4: Simplify right side
    102,880.47x = 10,992,136,372.25
  5. Step 5: Solve for x
    x = 10,992,136,372.25/102,880.47
  6. Step 6: Final answer
    x = 106,843.76

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1.5x scale

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.