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Finding the Fourth Proportional to 156,297.04, 215,689.62 and 84,679

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Solution

The fourth proportional to 156,297.04, 215,689.62 and 84,679 is: 116,856.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,297.04 : 215,689.62 = 84,679 : x
  2. Step 2: Convert to fraction form
    156,297.04/215,689.62 = 84,679/x
  3. Step 3: Cross multiply
    156,297.04x = 215,689.62 × 84,679
  4. Step 4: Simplify right side
    156,297.04x = 18,264,381,331.98
  5. Step 5: Solve for x
    x = 18,264,381,331.98/156,297.04
  6. Step 6: Final answer
    x = 116,856.86

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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.