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Finding the Fourth Proportional to 84,856.30, 127,320.90 and 43,303.30

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Solution

The fourth proportional to 84,856.30, 127,320.90 and 43,303.30 is: 64,973.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,856.30 : 127,320.90 = 43,303.30 : x
  2. Step 2: Convert to fraction form
    84,856.30/127,320.90 = 43,303.30/x
  3. Step 3: Cross multiply
    84,856.30x = 127,320.90 × 43,303.30
  4. Step 4: Simplify right side
    84,856.30x = 5,513,415,128.97
  5. Step 5: Solve for x
    x = 5,513,415,128.97/84,856.30
  6. Step 6: Final answer
    x = 64,973.55

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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.