Home / 86,000.20-128,708.70-75,502.60

Finding the Fourth Proportional to 86,000.20, 128,708.70 and 75,502.60

Calculator

Solution

The fourth proportional to 86,000.20, 128,708.70 and 75,502.60 is: 112,997.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,000.20 : 128,708.70 = 75,502.60 : x
  2. Step 2: Convert to fraction form
    86,000.20/128,708.70 = 75,502.60/x
  3. Step 3: Cross multiply
    86,000.20x = 128,708.70 × 75,502.60
  4. Step 4: Simplify right side
    86,000.20x = 9,717,841,492.62
  5. Step 5: Solve for x
    x = 9,717,841,492.62/86,000.20
  6. Step 6: Final answer
    x = 112,997.89

Related Problems

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.