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Finding the Fourth Proportional to 140,688.45, 210,934.26 and 70,529.49

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Solution

The fourth proportional to 140,688.45, 210,934.26 and 70,529.49 is: 105,744.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,688.45 : 210,934.26 = 70,529.49 : x
  2. Step 2: Convert to fraction form
    140,688.45/210,934.26 = 70,529.49/x
  3. Step 3: Cross multiply
    140,688.45x = 210,934.26 × 70,529.49
  4. Step 4: Simplify right side
    140,688.45x = 14,877,085,781.33
  5. Step 5: Solve for x
    x = 14,877,085,781.33/140,688.45
  6. Step 6: Final answer
    x = 105,744.90

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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.