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Finding the Fourth Proportional to 139,775.90, 192,890.97 and 76,113.95

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Solution

The fourth proportional to 139,775.90, 192,890.97 and 76,113.95 is: 105,037.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,775.90 : 192,890.97 = 76,113.95 : x
  2. Step 2: Convert to fraction form
    139,775.90/192,890.97 = 76,113.95/x
  3. Step 3: Cross multiply
    139,775.90x = 192,890.97 × 76,113.95
  4. Step 4: Simplify right side
    139,775.90x = 14,681,692,681.58
  5. Step 5: Solve for x
    x = 14,681,692,681.58/139,775.90
  6. Step 6: Final answer
    x = 105,037.37

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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.