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Finding the Fourth Proportional to 272,097.20, 407,805.60 and 139,030.40

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Solution

The fourth proportional to 272,097.20, 407,805.60 and 139,030.40 is: 208,371.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,097.20 : 407,805.60 = 139,030.40 : x
  2. Step 2: Convert to fraction form
    272,097.20/407,805.60 = 139,030.40/x
  3. Step 3: Cross multiply
    272,097.20x = 407,805.60 × 139,030.40
  4. Step 4: Simplify right side
    272,097.20x = 56,697,375,690.24
  5. Step 5: Solve for x
    x = 56,697,375,690.24/272,097.20
  6. Step 6: Final answer
    x = 208,371.77

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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.