Home / 272,459.28-408,688.56-85,485.36

Finding the Fourth Proportional to 272,459.28, 408,688.56 and 85,485.36

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Solution

The fourth proportional to 272,459.28, 408,688.56 and 85,485.36 is: 128,227.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,459.28 : 408,688.56 = 85,485.36 : x
  2. Step 2: Convert to fraction form
    272,459.28/408,688.56 = 85,485.36/x
  3. Step 3: Cross multiply
    272,459.28x = 408,688.56 × 85,485.36
  4. Step 4: Simplify right side
    272,459.28x = 34,936,888,679.48
  5. Step 5: Solve for x
    x = 34,936,888,679.48/272,459.28
  6. Step 6: Final answer
    x = 128,227.93

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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.