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Finding the Fourth Proportional to 144,866.40, 217,226.70 and 85,720.20

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Solution

The fourth proportional to 144,866.40, 217,226.70 and 85,720.20 is: 128,537.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,866.40 : 217,226.70 = 85,720.20 : x
  2. Step 2: Convert to fraction form
    144,866.40/217,226.70 = 85,720.20/x
  3. Step 3: Cross multiply
    144,866.40x = 217,226.70 × 85,720.20
  4. Step 4: Simplify right side
    144,866.40x = 18,620,716,169.34
  5. Step 5: Solve for x
    x = 18,620,716,169.34/144,866.40
  6. Step 6: Final answer
    x = 128,537.16

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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.