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Finding the Fourth Proportional to 92,486.36, 138,729.54 and 39,186.74

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Solution

The fourth proportional to 92,486.36, 138,729.54 and 39,186.74 is: 58,780.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,486.36 : 138,729.54 = 39,186.74 : x
  2. Step 2: Convert to fraction form
    92,486.36/138,729.54 = 39,186.74/x
  3. Step 3: Cross multiply
    92,486.36x = 138,729.54 × 39,186.74
  4. Step 4: Simplify right side
    92,486.36x = 5,436,357,720.65
  5. Step 5: Solve for x
    x = 5,436,357,720.65/92,486.36
  6. Step 6: Final answer
    x = 58,780.11

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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.