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Finding the Fourth Proportional to 272,038.70, 408,058.05 and 85,069.10

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Solution

The fourth proportional to 272,038.70, 408,058.05 and 85,069.10 is: 127,603.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,038.70 : 408,058.05 = 85,069.10 : x
  2. Step 2: Convert to fraction form
    272,038.70/408,058.05 = 85,069.10/x
  3. Step 3: Cross multiply
    272,038.70x = 408,058.05 × 85,069.10
  4. Step 4: Simplify right side
    272,038.70x = 34,713,131,061.26
  5. Step 5: Solve for x
    x = 34,713,131,061.26/272,038.70
  6. Step 6: Final answer
    x = 127,603.65

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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.