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Finding the Fourth Proportional to 139,373.61, 192,348.44 and 78,946.80

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Solution

The fourth proportional to 139,373.61, 192,348.44 and 78,946.80 is: 108,953.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,373.61 : 192,348.44 = 78,946.80 : x
  2. Step 2: Convert to fraction form
    139,373.61/192,348.44 = 78,946.80/x
  3. Step 3: Cross multiply
    139,373.61x = 192,348.44 × 78,946.80
  4. Step 4: Simplify right side
    139,373.61x = 15,185,293,822.99
  5. Step 5: Solve for x
    x = 15,185,293,822.99/139,373.61
  6. Step 6: Final answer
    x = 108,953.87

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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.