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Finding the Fourth Proportional to 143,079.60, 214,619.40 and 84,030.60

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Solution

The fourth proportional to 143,079.60, 214,619.40 and 84,030.60 is: 126,045.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,079.60 : 214,619.40 = 84,030.60 : x
  2. Step 2: Convert to fraction form
    143,079.60/214,619.40 = 84,030.60/x
  3. Step 3: Cross multiply
    143,079.60x = 214,619.40 × 84,030.60
  4. Step 4: Simplify right side
    143,079.60x = 18,034,596,953.64
  5. Step 5: Solve for x
    x = 18,034,596,953.64/143,079.60
  6. Step 6: Final answer
    x = 126,045.90

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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.