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Finding the Fourth Proportional to 139,798.55, 192,920.67 and 76,137.41

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Solution

The fourth proportional to 139,798.55, 192,920.67 and 76,137.41 is: 105,068.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,798.55 : 192,920.67 = 76,137.41 : x
  2. Step 2: Convert to fraction form
    139,798.55/192,920.67 = 76,137.41/x
  3. Step 3: Cross multiply
    139,798.55x = 192,920.67 × 76,137.41
  4. Step 4: Simplify right side
    139,798.55x = 14,688,480,149.26
  5. Step 5: Solve for x
    x = 14,688,480,149.26/139,798.55
  6. Step 6: Final answer
    x = 105,068.90

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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.