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Finding the Fourth Proportional to 272,983.80, 409,533.30 and 86,014.20

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Solution

The fourth proportional to 272,983.80, 409,533.30 and 86,014.20 is: 129,039.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,983.80 : 409,533.30 = 86,014.20 : x
  2. Step 2: Convert to fraction form
    272,983.80/409,533.30 = 86,014.20/x
  3. Step 3: Cross multiply
    272,983.80x = 409,533.30 × 86,014.20
  4. Step 4: Simplify right side
    272,983.80x = 35,225,679,172.86
  5. Step 5: Solve for x
    x = 35,225,679,172.86/272,983.80
  6. Step 6: Final answer
    x = 129,039.45

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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.