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Finding the Fourth Proportional to 165,661.70, 248,492.55 and 139,417.70

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Solution

The fourth proportional to 165,661.70, 248,492.55 and 139,417.70 is: 209,126.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,661.70 : 248,492.55 = 139,417.70 : x
  2. Step 2: Convert to fraction form
    165,661.70/248,492.55 = 139,417.70/x
  3. Step 3: Cross multiply
    165,661.70x = 248,492.55 × 139,417.70
  4. Step 4: Simplify right side
    165,661.70x = 34,644,259,788.14
  5. Step 5: Solve for x
    x = 34,644,259,788.14/165,661.70
  6. Step 6: Final answer
    x = 209,126.55

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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.