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Finding the Fourth Proportional to 140,719.20, 211,251.60 and 139,682.40

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Solution

The fourth proportional to 140,719.20, 211,251.60 and 139,682.40 is: 209,695.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,719.20 : 211,251.60 = 139,682.40 : x
  2. Step 2: Convert to fraction form
    140,719.20/211,251.60 = 139,682.40/x
  3. Step 3: Cross multiply
    140,719.20x = 211,251.60 × 139,682.40
  4. Step 4: Simplify right side
    140,719.20x = 29,508,130,491.84
  5. Step 5: Solve for x
    x = 29,508,130,491.84/140,719.20
  6. Step 6: Final answer
    x = 209,695.13

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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.