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Finding the Fourth Proportional to 85,833.69, 128,747.80 and 26,653.47

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Solution

The fourth proportional to 85,833.69, 128,747.80 and 26,653.47 is: 39,979.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,833.69 : 128,747.80 = 26,653.47 : x
  2. Step 2: Convert to fraction form
    85,833.69/128,747.80 = 26,653.47/x
  3. Step 3: Cross multiply
    85,833.69x = 128,747.80 × 26,653.47
  4. Step 4: Simplify right side
    85,833.69x = 3,431,575,558.23
  5. Step 5: Solve for x
    x = 3,431,575,558.23/85,833.69
  6. Step 6: Final answer
    x = 39,979.35

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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.