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Finding the Fourth Proportional to 71,522.10, 98,700.58 and 39,690.98

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Solution

The fourth proportional to 71,522.10, 98,700.58 and 39,690.98 is: 54,773.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,522.10 : 98,700.58 = 39,690.98 : x
  2. Step 2: Convert to fraction form
    71,522.10/98,700.58 = 39,690.98/x
  3. Step 3: Cross multiply
    71,522.10x = 98,700.58 × 39,690.98
  4. Step 4: Simplify right side
    71,522.10x = 3,917,522,746.77
  5. Step 5: Solve for x
    x = 3,917,522,746.77/71,522.10
  6. Step 6: Final answer
    x = 54,773.60

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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.