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Finding the Fourth Proportional to 111,070.69, 153,215.26 and 68,071.02

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Solution

The fourth proportional to 111,070.69, 153,215.26 and 68,071.02 is: 93,899.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,070.69 : 153,215.26 = 68,071.02 : x
  2. Step 2: Convert to fraction form
    111,070.69/153,215.26 = 68,071.02/x
  3. Step 3: Cross multiply
    111,070.69x = 153,215.26 × 68,071.02
  4. Step 4: Simplify right side
    111,070.69x = 10,429,519,027.77
  5. Step 5: Solve for x
    x = 10,429,519,027.77/111,070.69
  6. Step 6: Final answer
    x = 93,899.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.