Home / 131,457.40-197,186.10-86,356.60

Finding the Fourth Proportional to 131,457.40, 197,186.10 and 86,356.60

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Solution

The fourth proportional to 131,457.40, 197,186.10 and 86,356.60 is: 129,534.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,457.40 : 197,186.10 = 86,356.60 : x
  2. Step 2: Convert to fraction form
    131,457.40/197,186.10 = 86,356.60/x
  3. Step 3: Cross multiply
    131,457.40x = 197,186.10 × 86,356.60
  4. Step 4: Simplify right side
    131,457.40x = 17,028,321,163.26
  5. Step 5: Solve for x
    x = 17,028,321,163.26/131,457.40
  6. Step 6: Final answer
    x = 129,534.90

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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.