Home / 86,979.84-130,504.32-31,580.16

Finding the Fourth Proportional to 86,979.84, 130,504.32 and 31,580.16

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Solution

The fourth proportional to 86,979.84, 130,504.32 and 31,580.16 is: 47,382.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,979.84 : 130,504.32 = 31,580.16 : x
  2. Step 2: Convert to fraction form
    86,979.84/130,504.32 = 31,580.16/x
  3. Step 3: Cross multiply
    86,979.84x = 130,504.32 × 31,580.16
  4. Step 4: Simplify right side
    86,979.84x = 4,121,347,306.29
  5. Step 5: Solve for x
    x = 4,121,347,306.29/86,979.84
  6. Step 6: Final answer
    x = 47,382.79

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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.