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Finding the Fourth Proportional to 139,041.72, 191,739.42 and 104,668.77

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Solution

The fourth proportional to 139,041.72, 191,739.42 and 104,668.77 is: 144,338.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,041.72 : 191,739.42 = 104,668.77 : x
  2. Step 2: Convert to fraction form
    139,041.72/191,739.42 = 104,668.77/x
  3. Step 3: Cross multiply
    139,041.72x = 191,739.42 × 104,668.77
  4. Step 4: Simplify right side
    139,041.72x = 20,069,129,251.91
  5. Step 5: Solve for x
    x = 20,069,129,251.91/139,041.72
  6. Step 6: Final answer
    x = 144,338.90

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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.