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Finding the Fourth Proportional to 272,039.70, 408,059.55 and 85,070.10

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Solution

The fourth proportional to 272,039.70, 408,059.55 and 85,070.10 is: 127,605.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,039.70 : 408,059.55 = 85,070.10 : x
  2. Step 2: Convert to fraction form
    272,039.70/408,059.55 = 85,070.10/x
  3. Step 3: Cross multiply
    272,039.70x = 408,059.55 × 85,070.10
  4. Step 4: Simplify right side
    272,039.70x = 34,713,666,724.46
  5. Step 5: Solve for x
    x = 34,713,666,724.46/272,039.70
  6. Step 6: Final answer
    x = 127,605.15

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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.