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Finding the Fourth Proportional to 139,473.68, 209,238.36 and 72,943.76

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Solution

The fourth proportional to 139,473.68, 209,238.36 and 72,943.76 is: 109,430.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,473.68 : 209,238.36 = 72,943.76 : x
  2. Step 2: Convert to fraction form
    139,473.68/209,238.36 = 72,943.76/x
  3. Step 3: Cross multiply
    139,473.68x = 209,238.36 × 72,943.76
  4. Step 4: Simplify right side
    139,473.68x = 15,262,632,714.63
  5. Step 5: Solve for x
    x = 15,262,632,714.63/139,473.68
  6. Step 6: Final answer
    x = 109,430.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.