Home / 86,725.15-129,994.41-56,728.09

Finding the Fourth Proportional to 86,725.15, 129,994.41 and 56,728.09

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Solution

The fourth proportional to 86,725.15, 129,994.41 and 56,728.09 is: 85,031.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,725.15 : 129,994.41 = 56,728.09 : x
  2. Step 2: Convert to fraction form
    86,725.15/129,994.41 = 56,728.09/x
  3. Step 3: Cross multiply
    86,725.15x = 129,994.41 × 56,728.09
  4. Step 4: Simplify right side
    86,725.15x = 7,374,334,589.98
  5. Step 5: Solve for x
    x = 7,374,334,589.98/86,725.15
  6. Step 6: Final answer
    x = 85,031.10

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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.