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Finding the Fourth Proportional to 143,928.80, 215,698.80 and 127,210.40

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Solution

The fourth proportional to 143,928.80, 215,698.80 and 127,210.40 is: 190,643.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,928.80 : 215,698.80 = 127,210.40 : x
  2. Step 2: Convert to fraction form
    143,928.80/215,698.80 = 127,210.40/x
  3. Step 3: Cross multiply
    143,928.80x = 215,698.80 × 127,210.40
  4. Step 4: Simplify right side
    143,928.80x = 27,439,130,627.52
  5. Step 5: Solve for x
    x = 27,439,130,627.52/143,928.80
  6. Step 6: Final answer
    x = 190,643.78

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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.