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Finding the Fourth Proportional to 86,422.32, 129,638.16 and 27,262.44

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Solution

The fourth proportional to 86,422.32, 129,638.16 and 27,262.44 is: 40,895.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,422.32 : 129,638.16 = 27,262.44 : x
  2. Step 2: Convert to fraction form
    86,422.32/129,638.16 = 27,262.44/x
  3. Step 3: Cross multiply
    86,422.32x = 129,638.16 × 27,262.44
  4. Step 4: Simplify right side
    86,422.32x = 3,534,252,558.71
  5. Step 5: Solve for x
    x = 3,534,252,558.71/86,422.32
  6. Step 6: Final answer
    x = 40,895.14

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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.