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Finding the Fourth Proportional to 169,702.32, 254,549.53 and 85,439.86

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Solution

The fourth proportional to 169,702.32, 254,549.53 and 85,439.86 is: 128,157.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,702.32 : 254,549.53 = 85,439.86 : x
  2. Step 2: Convert to fraction form
    169,702.32/254,549.53 = 85,439.86/x
  3. Step 3: Cross multiply
    169,702.32x = 254,549.53 × 85,439.86
  4. Step 4: Simplify right side
    169,702.32x = 21,748,675,676.69
  5. Step 5: Solve for x
    x = 21,748,675,676.69/169,702.32
  6. Step 6: Final answer
    x = 128,157.80

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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.