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Finding the Fourth Proportional to 245,430.20, 367,691.70 and 139,935.80

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Solution

The fourth proportional to 245,430.20, 367,691.70 and 139,935.80 is: 209,645.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,430.20 : 367,691.70 = 139,935.80 : x
  2. Step 2: Convert to fraction form
    245,430.20/367,691.70 = 139,935.80/x
  3. Step 3: Cross multiply
    245,430.20x = 367,691.70 × 139,935.80
  4. Step 4: Simplify right side
    245,430.20x = 51,453,232,192.86
  5. Step 5: Solve for x
    x = 51,453,232,192.86/245,430.20
  6. Step 6: Final answer
    x = 209,645.07

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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.