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Finding the Fourth Proportional to 86,531.40, 129,783.60 and 27,381.60

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Solution

The fourth proportional to 86,531.40, 129,783.60 and 27,381.60 is: 41,068.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,531.40 : 129,783.60 = 27,381.60 : x
  2. Step 2: Convert to fraction form
    86,531.40/129,783.60 = 27,381.60/x
  3. Step 3: Cross multiply
    86,531.40x = 129,783.60 × 27,381.60
  4. Step 4: Simplify right side
    86,531.40x = 3,553,682,621.76
  5. Step 5: Solve for x
    x = 3,553,682,621.76/86,531.40
  6. Step 6: Final answer
    x = 41,068.13

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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.