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Finding the Fourth Proportional to 139,939.50, 193,113.64 and 76,276.74

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Solution

The fourth proportional to 139,939.50, 193,113.64 and 76,276.74 is: 105,260.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,939.50 : 193,113.64 = 76,276.74 : x
  2. Step 2: Convert to fraction form
    139,939.50/193,113.64 = 76,276.74/x
  3. Step 3: Cross multiply
    139,939.50x = 193,113.64 × 76,276.74
  4. Step 4: Simplify right side
    139,939.50x = 14,730,078,908.73
  5. Step 5: Solve for x
    x = 14,730,078,908.73/139,939.50
  6. Step 6: Final answer
    x = 105,260.34

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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.