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Finding the Fourth Proportional to 140,095.49, 210,255.21 and 72,646.68

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Solution

The fourth proportional to 140,095.49, 210,255.21 and 72,646.68 is: 109,028.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,095.49 : 210,255.21 = 72,646.68 : x
  2. Step 2: Convert to fraction form
    140,095.49/210,255.21 = 72,646.68/x
  3. Step 3: Cross multiply
    140,095.49x = 210,255.21 × 72,646.68
  4. Step 4: Simplify right side
    140,095.49x = 15,274,343,747.66
  5. Step 5: Solve for x
    x = 15,274,343,747.66/140,095.49
  6. Step 6: Final answer
    x = 109,028.09

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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.