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Finding the Fourth Proportional to 139,023.46, 191,860.66 and 78,599.74

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Solution

The fourth proportional to 139,023.46, 191,860.66 and 78,599.74 is: 108,472.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,023.46 : 191,860.66 = 78,599.74 : x
  2. Step 2: Convert to fraction form
    139,023.46/191,860.66 = 78,599.74/x
  3. Step 3: Cross multiply
    139,023.46x = 191,860.66 × 78,599.74
  4. Step 4: Simplify right side
    139,023.46x = 15,080,197,992.23
  5. Step 5: Solve for x
    x = 15,080,197,992.23/139,023.46
  6. Step 6: Final answer
    x = 108,472.33

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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.