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Finding the Fourth Proportional to 272,368.16, 408,617.85 and 85,379.66

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Solution

The fourth proportional to 272,368.16, 408,617.85 and 85,379.66 is: 128,090.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,368.16 : 408,617.85 = 85,379.66 : x
  2. Step 2: Convert to fraction form
    272,368.16/408,617.85 = 85,379.66/x
  3. Step 3: Cross multiply
    272,368.16x = 408,617.85 × 85,379.66
  4. Step 4: Simplify right side
    272,368.16x = 34,887,650,632.94
  5. Step 5: Solve for x
    x = 34,887,650,632.94/272,368.16
  6. Step 6: Final answer
    x = 128,090.05

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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.