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Finding the Fourth Proportional to 189,020.70, 260,845.65 and 104,140.80

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Solution

The fourth proportional to 189,020.70, 260,845.65 and 104,140.80 is: 143,712.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,020.70 : 260,845.65 = 104,140.80 : x
  2. Step 2: Convert to fraction form
    189,020.70/260,845.65 = 104,140.80/x
  3. Step 3: Cross multiply
    189,020.70x = 260,845.65 × 104,140.80
  4. Step 4: Simplify right side
    189,020.70x = 27,164,674,667.52
  5. Step 5: Solve for x
    x = 27,164,674,667.52/189,020.70
  6. Step 6: Final answer
    x = 143,712.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.