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Finding the Fourth Proportional to 145,979.70, 218,969.55 and 140,147.70

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Solution

The fourth proportional to 145,979.70, 218,969.55 and 140,147.70 is: 210,221.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,979.70 : 218,969.55 = 140,147.70 : x
  2. Step 2: Convert to fraction form
    145,979.70/218,969.55 = 140,147.70/x
  3. Step 3: Cross multiply
    145,979.70x = 218,969.55 × 140,147.70
  4. Step 4: Simplify right side
    145,979.70x = 30,688,078,802.54
  5. Step 5: Solve for x
    x = 30,688,078,802.54/145,979.70
  6. Step 6: Final answer
    x = 210,221.55

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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.