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Finding the Fourth Proportional to 144,139.70, 215,626.35 and 126,643.70

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Solution

The fourth proportional to 144,139.70, 215,626.35 and 126,643.70 is: 189,453.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,139.70 : 215,626.35 = 126,643.70 : x
  2. Step 2: Convert to fraction form
    144,139.70/215,626.35 = 126,643.70/x
  3. Step 3: Cross multiply
    144,139.70x = 215,626.35 × 126,643.70
  4. Step 4: Simplify right side
    144,139.70x = 27,307,718,781.50
  5. Step 5: Solve for x
    x = 27,307,718,781.50/144,139.70
  6. Step 6: Final answer
    x = 189,453.14

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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.