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Finding the Fourth Proportional to 245,638.38, 368,521.96 and 77,151.90

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Solution

The fourth proportional to 245,638.38, 368,521.96 and 77,151.90 is: 115,748.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,638.38 : 368,521.96 = 77,151.90 : x
  2. Step 2: Convert to fraction form
    245,638.38/368,521.96 = 77,151.90/x
  3. Step 3: Cross multiply
    245,638.38x = 368,521.96 × 77,151.90
  4. Step 4: Simplify right side
    245,638.38x = 28,432,169,405.72
  5. Step 5: Solve for x
    x = 28,432,169,405.72/245,638.38
  6. Step 6: Final answer
    x = 115,748.07

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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.