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Finding the Fourth Proportional to 140,871.42, 211,238.15 and 69,711.91

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Solution

The fourth proportional to 140,871.42, 211,238.15 and 69,711.91 is: 104,533.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,871.42 : 211,238.15 = 69,711.91 : x
  2. Step 2: Convert to fraction form
    140,871.42/211,238.15 = 69,711.91/x
  3. Step 3: Cross multiply
    140,871.42x = 211,238.15 × 69,711.91
  4. Step 4: Simplify right side
    140,871.42x = 14,725,814,024.71
  5. Step 5: Solve for x
    x = 14,725,814,024.71/140,871.42
  6. Step 6: Final answer
    x = 104,533.72

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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.