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Finding the Fourth Proportional to 85,616.31, 128,430.63 and 26,444.31

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Solution

The fourth proportional to 85,616.31, 128,430.63 and 26,444.31 is: 39,668.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,616.31 : 128,430.63 = 26,444.31 : x
  2. Step 2: Convert to fraction form
    85,616.31/128,430.63 = 26,444.31/x
  3. Step 3: Cross multiply
    85,616.31x = 128,430.63 × 26,444.31
  4. Step 4: Simplify right side
    85,616.31x = 3,396,259,393.22
  5. Step 5: Solve for x
    x = 3,396,259,393.22/85,616.31
  6. Step 6: Final answer
    x = 39,668.37

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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.