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Finding the Fourth Proportional to 143,034.44, 197,392.80 and 86,434.88

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Solution

The fourth proportional to 143,034.44, 197,392.80 and 86,434.88 is: 119,283.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,034.44 : 197,392.80 = 86,434.88 : x
  2. Step 2: Convert to fraction form
    143,034.44/197,392.80 = 86,434.88/x
  3. Step 3: Cross multiply
    143,034.44x = 197,392.80 × 86,434.88
  4. Step 4: Simplify right side
    143,034.44x = 17,061,622,980.86
  5. Step 5: Solve for x
    x = 17,061,622,980.86/143,034.44
  6. Step 6: Final answer
    x = 119,283.32

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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.