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Finding the Fourth Proportional to 143,389.60, 215,122.80 and 127,914.40

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Solution

The fourth proportional to 143,389.60, 215,122.80 and 127,914.40 is: 191,905.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,389.60 : 215,122.80 = 127,914.40 : x
  2. Step 2: Convert to fraction form
    143,389.60/215,122.80 = 127,914.40/x
  3. Step 3: Cross multiply
    143,389.60x = 215,122.80 × 127,914.40
  4. Step 4: Simplify right side
    143,389.60x = 27,517,303,888.32
  5. Step 5: Solve for x
    x = 27,517,303,888.32/143,389.60
  6. Step 6: Final answer
    x = 191,905.86

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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.