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Finding the Fourth Proportional to 147,709.90, 203,828.15 and 87,269.08

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Solution

The fourth proportional to 147,709.90, 203,828.15 and 87,269.08 is: 120,424.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,709.90 : 203,828.15 = 87,269.08 : x
  2. Step 2: Convert to fraction form
    147,709.90/203,828.15 = 87,269.08/x
  3. Step 3: Cross multiply
    147,709.90x = 203,828.15 × 87,269.08
  4. Step 4: Simplify right side
    147,709.90x = 17,787,893,782.20
  5. Step 5: Solve for x
    x = 17,787,893,782.20/147,709.90
  6. Step 6: Final answer
    x = 120,424.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.