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Finding the Fourth Proportional to 139,352.57, 192,307.55 and 75,690.39

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Solution

The fourth proportional to 139,352.57, 192,307.55 and 75,690.39 is: 104,453.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,352.57 : 192,307.55 = 75,690.39 : x
  2. Step 2: Convert to fraction form
    139,352.57/192,307.55 = 75,690.39/x
  3. Step 3: Cross multiply
    139,352.57x = 192,307.55 × 75,690.39
  4. Step 4: Simplify right side
    139,352.57x = 14,555,833,080.99
  5. Step 5: Solve for x
    x = 14,555,833,080.99/139,352.57
  6. Step 6: Final answer
    x = 104,453.28

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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.