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Finding the Fourth Proportional to 103,689.30, 155,339.55 and 96,690.90

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Solution

The fourth proportional to 103,689.30, 155,339.55 and 96,690.90 is: 144,855.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,689.30 : 155,339.55 = 96,690.90 : x
  2. Step 2: Convert to fraction form
    103,689.30/155,339.55 = 96,690.90/x
  3. Step 3: Cross multiply
    103,689.30x = 155,339.55 × 96,690.90
  4. Step 4: Simplify right side
    103,689.30x = 15,019,920,895.10
  5. Step 5: Solve for x
    x = 15,019,920,895.10/103,689.30
  6. Step 6: Final answer
    x = 144,855.07

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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.