Home / 145,268.34-218,310.75-86,112.42

Finding the Fourth Proportional to 145,268.34, 218,310.75 and 86,112.42

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Solution

The fourth proportional to 145,268.34, 218,310.75 and 86,112.42 is: 129,410.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,268.34 : 218,310.75 = 86,112.42 : x
  2. Step 2: Convert to fraction form
    145,268.34/218,310.75 = 86,112.42/x
  3. Step 3: Cross multiply
    145,268.34x = 218,310.75 × 86,112.42
  4. Step 4: Simplify right side
    145,268.34x = 18,799,266,994.52
  5. Step 5: Solve for x
    x = 18,799,266,994.52/145,268.34
  6. Step 6: Final answer
    x = 129,410.63

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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.