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Finding the Fourth Proportional to 272,501.76, 408,951.36 and 139,493.28

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Solution

The fourth proportional to 272,501.76, 408,951.36 and 139,493.28 is: 209,341.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,501.76 : 408,951.36 = 139,493.28 : x
  2. Step 2: Convert to fraction form
    272,501.76/408,951.36 = 139,493.28/x
  3. Step 3: Cross multiply
    272,501.76x = 408,951.36 × 139,493.28
  4. Step 4: Simplify right side
    272,501.76x = 57,045,966,566.86
  5. Step 5: Solve for x
    x = 57,045,966,566.86/272,501.76
  6. Step 6: Final answer
    x = 209,341.64

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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.