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Finding the Fourth Proportional to 83,690.65, 115,492.72 and 45,449.90

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Solution

The fourth proportional to 83,690.65, 115,492.72 and 45,449.90 is: 62,720.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,690.65 : 115,492.72 = 45,449.90 : x
  2. Step 2: Convert to fraction form
    83,690.65/115,492.72 = 45,449.90/x
  3. Step 3: Cross multiply
    83,690.65x = 115,492.72 × 45,449.90
  4. Step 4: Simplify right side
    83,690.65x = 5,249,131,997.26
  5. Step 5: Solve for x
    x = 5,249,131,997.26/83,690.65
  6. Step 6: Final answer
    x = 62,720.65

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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.