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Finding the Fourth Proportional to 169,878.10, 254,817.15 and 85,897.30

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Solution

The fourth proportional to 169,878.10, 254,817.15 and 85,897.30 is: 128,845.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,878.10 : 254,817.15 = 85,897.30 : x
  2. Step 2: Convert to fraction form
    169,878.10/254,817.15 = 85,897.30/x
  3. Step 3: Cross multiply
    169,878.10x = 254,817.15 × 85,897.30
  4. Step 4: Simplify right side
    169,878.10x = 21,888,105,178.70
  5. Step 5: Solve for x
    x = 21,888,105,178.70/169,878.10
  6. Step 6: Final answer
    x = 128,845.95

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1.5x scale

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.