Home / 86,627.20-129,940.80-47,261.20

Finding the Fourth Proportional to 86,627.20, 129,940.80 and 47,261.20

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Solution

The fourth proportional to 86,627.20, 129,940.80 and 47,261.20 is: 70,891.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,627.20 : 129,940.80 = 47,261.20 : x
  2. Step 2: Convert to fraction form
    86,627.20/129,940.80 = 47,261.20/x
  3. Step 3: Cross multiply
    86,627.20x = 129,940.80 × 47,261.20
  4. Step 4: Simplify right side
    86,627.20x = 6,141,158,136.96
  5. Step 5: Solve for x
    x = 6,141,158,136.96/86,627.20
  6. Step 6: Final answer
    x = 70,891.80

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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.