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Finding the Fourth Proportional to 144,891.10, 217,235.40 and 85,696.30

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Solution

The fourth proportional to 144,891.10, 217,235.40 and 85,696.30 is: 128,484.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,891.10 : 217,235.40 = 85,696.30 : x
  2. Step 2: Convert to fraction form
    144,891.10/217,235.40 = 85,696.30/x
  3. Step 3: Cross multiply
    144,891.10x = 217,235.40 × 85,696.30
  4. Step 4: Simplify right side
    144,891.10x = 18,616,270,009.02
  5. Step 5: Solve for x
    x = 18,616,270,009.02/144,891.10
  6. Step 6: Final answer
    x = 128,484.57

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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.