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Finding the Fourth Proportional to 143,398.40, 215,097.60 and 142,476.80

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Solution

The fourth proportional to 143,398.40, 215,097.60 and 142,476.80 is: 213,715.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,398.40 : 215,097.60 = 142,476.80 : x
  2. Step 2: Convert to fraction form
    143,398.40/215,097.60 = 142,476.80/x
  3. Step 3: Cross multiply
    143,398.40x = 215,097.60 × 142,476.80
  4. Step 4: Simplify right side
    143,398.40x = 30,646,417,735.68
  5. Step 5: Solve for x
    x = 30,646,417,735.68/143,398.40
  6. Step 6: Final answer
    x = 213,715.20

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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.