Home / 256,359.40-384,540.04-78,865.18

Finding the Fourth Proportional to 256,359.40, 384,540.04 and 78,865.18

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Solution

The fourth proportional to 256,359.40, 384,540.04 and 78,865.18 is: 118,298.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,359.40 : 384,540.04 = 78,865.18 : x
  2. Step 2: Convert to fraction form
    256,359.40/384,540.04 = 78,865.18/x
  3. Step 3: Cross multiply
    256,359.40x = 384,540.04 × 78,865.18
  4. Step 4: Simplify right side
    256,359.40x = 30,326,819,471.81
  5. Step 5: Solve for x
    x = 30,326,819,471.81/256,359.40
  6. Step 6: Final answer
    x = 118,298.06

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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.