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Finding the Fourth Proportional to 86,838.80, 130,265.40 and 27,672.80

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Solution

The fourth proportional to 86,838.80, 130,265.40 and 27,672.80 is: 41,511.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,838.80 : 130,265.40 = 27,672.80 : x
  2. Step 2: Convert to fraction form
    86,838.80/130,265.40 = 27,672.80/x
  3. Step 3: Cross multiply
    86,838.80x = 130,265.40 × 27,672.80
  4. Step 4: Simplify right side
    86,838.80x = 3,604,808,361.12
  5. Step 5: Solve for x
    x = 3,604,808,361.12/86,838.80
  6. Step 6: Final answer
    x = 41,511.49

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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.