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Finding the Fourth Proportional to 210,994.68, 316,426.41 and 70,720.50

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Solution

The fourth proportional to 210,994.68, 316,426.41 and 70,720.50 is: 106,058.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,994.68 : 316,426.41 = 70,720.50 : x
  2. Step 2: Convert to fraction form
    210,994.68/316,426.41 = 70,720.50/x
  3. Step 3: Cross multiply
    210,994.68x = 316,426.41 × 70,720.50
  4. Step 4: Simplify right side
    210,994.68x = 22,377,833,928.41
  5. Step 5: Solve for x
    x = 22,377,833,928.41/210,994.68
  6. Step 6: Final answer
    x = 106,058.76

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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.