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Finding the Fourth Proportional to 86,137.80, 129,206.71 and 26,978.10

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Solution

The fourth proportional to 86,137.80, 129,206.71 and 26,978.10 is: 40,467.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,137.80 : 129,206.71 = 26,978.10 : x
  2. Step 2: Convert to fraction form
    86,137.80/129,206.71 = 26,978.10/x
  3. Step 3: Cross multiply
    86,137.80x = 129,206.71 × 26,978.10
  4. Step 4: Simplify right side
    86,137.80x = 3,485,751,731.18
  5. Step 5: Solve for x
    x = 3,485,751,731.18/86,137.80
  6. Step 6: Final answer
    x = 40,467.15

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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.