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Finding the Fourth Proportional to 156,297.54, 215,690.31 and 84,679.50

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Solution

The fourth proportional to 156,297.54, 215,690.31 and 84,679.50 is: 116,857.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,297.54 : 215,690.31 = 84,679.50 : x
  2. Step 2: Convert to fraction form
    156,297.54/215,690.31 = 84,679.50/x
  3. Step 3: Cross multiply
    156,297.54x = 215,690.31 × 84,679.50
  4. Step 4: Simplify right side
    156,297.54x = 18,264,547,605.65
  5. Step 5: Solve for x
    x = 18,264,547,605.65/156,297.54
  6. Step 6: Final answer
    x = 116,857.55

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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.