Home / 86,829.12-119,364.68-74,685.20

Finding the Fourth Proportional to 86,829.12, 119,364.68 and 74,685.20

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Solution

The fourth proportional to 86,829.12, 119,364.68 and 74,685.20 is: 102,670.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,829.12 : 119,364.68 = 74,685.20 : x
  2. Step 2: Convert to fraction form
    86,829.12/119,364.68 = 74,685.20/x
  3. Step 3: Cross multiply
    86,829.12x = 119,364.68 × 74,685.20
  4. Step 4: Simplify right side
    86,829.12x = 8,914,774,998.74
  5. Step 5: Solve for x
    x = 8,914,774,998.74/86,829.12
  6. Step 6: Final answer
    x = 102,670.34

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.