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Finding the Fourth Proportional to 84,881.70, 127,322.55 and 45,515.70

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Solution

The fourth proportional to 84,881.70, 127,322.55 and 45,515.70 is: 68,273.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,881.70 : 127,322.55 = 45,515.70 : x
  2. Step 2: Convert to fraction form
    84,881.70/127,322.55 = 45,515.70/x
  3. Step 3: Cross multiply
    84,881.70x = 127,322.55 × 45,515.70
  4. Step 4: Simplify right side
    84,881.70x = 5,795,174,989.04
  5. Step 5: Solve for x
    x = 5,795,174,989.04/84,881.70
  6. Step 6: Final answer
    x = 68,273.55

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1.5x scale

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.