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Finding the Fourth Proportional to 84,718.81, 127,071.27 and 28,557.70

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Solution

The fourth proportional to 84,718.81, 127,071.27 and 28,557.70 is: 42,834.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,718.81 : 127,071.27 = 28,557.70 : x
  2. Step 2: Convert to fraction form
    84,718.81/127,071.27 = 28,557.70/x
  3. Step 3: Cross multiply
    84,718.81x = 127,071.27 × 28,557.70
  4. Step 4: Simplify right side
    84,718.81x = 3,628,863,207.28
  5. Step 5: Solve for x
    x = 3,628,863,207.28/84,718.81
  6. Step 6: Final answer
    x = 42,834.21

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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.