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Finding the Fourth Proportional to 272,492.16, 408,807.36 and 85,505.28

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Solution

The fourth proportional to 272,492.16, 408,807.36 and 85,505.28 is: 128,279.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,492.16 : 408,807.36 = 85,505.28 : x
  2. Step 2: Convert to fraction form
    272,492.16/408,807.36 = 85,505.28/x
  3. Step 3: Cross multiply
    272,492.16x = 408,807.36 × 85,505.28
  4. Step 4: Simplify right side
    272,492.16x = 34,955,187,782.86
  5. Step 5: Solve for x
    x = 34,955,187,782.86/272,492.16
  6. Step 6: Final answer
    x = 128,279.61

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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.