Home / 86,438.12-129,657.30-56,987.48

Finding the Fourth Proportional to 86,438.12, 129,657.30 and 56,987.48

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Solution

The fourth proportional to 86,438.12, 129,657.30 and 56,987.48 is: 85,481.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,438.12 : 129,657.30 = 56,987.48 : x
  2. Step 2: Convert to fraction form
    86,438.12/129,657.30 = 56,987.48/x
  3. Step 3: Cross multiply
    86,438.12x = 129,657.30 × 56,987.48
  4. Step 4: Simplify right side
    86,438.12x = 7,388,842,790.60
  5. Step 5: Solve for x
    x = 7,388,842,790.60/86,438.12
  6. Step 6: Final answer
    x = 85,481.30

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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.