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Finding the Fourth Proportional to 70,700.58, 106,051.71 and 18,108.66

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Solution

The fourth proportional to 70,700.58, 106,051.71 and 18,108.66 is: 27,163.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,700.58 : 106,051.71 = 18,108.66 : x
  2. Step 2: Convert to fraction form
    70,700.58/106,051.71 = 18,108.66/x
  3. Step 3: Cross multiply
    70,700.58x = 106,051.71 × 18,108.66
  4. Step 4: Simplify right side
    70,700.58x = 1,920,454,358.81
  5. Step 5: Solve for x
    x = 1,920,454,358.81/70,700.58
  6. Step 6: Final answer
    x = 27,163.21

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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.