Home / 86,388.12-129,416.16-53,010.96

Finding the Fourth Proportional to 86,388.12, 129,416.16 and 53,010.96

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Solution

The fourth proportional to 86,388.12, 129,416.16 and 53,010.96 is: 79,414.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,388.12 : 129,416.16 = 53,010.96 : x
  2. Step 2: Convert to fraction form
    86,388.12/129,416.16 = 53,010.96/x
  3. Step 3: Cross multiply
    86,388.12x = 129,416.16 × 53,010.96
  4. Step 4: Simplify right side
    86,388.12x = 6,860,474,881.11
  5. Step 5: Solve for x
    x = 6,860,474,881.11/86,388.12
  6. Step 6: Final answer
    x = 79,414.56

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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.