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Finding the Fourth Proportional to 84,981.79, 127,392.93 and 28,782.55

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Solution

The fourth proportional to 84,981.79, 127,392.93 and 28,782.55 is: 43,146.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,981.79 : 127,392.93 = 28,782.55 : x
  2. Step 2: Convert to fraction form
    84,981.79/127,392.93 = 28,782.55/x
  3. Step 3: Cross multiply
    84,981.79x = 127,392.93 × 28,782.55
  4. Step 4: Simplify right side
    84,981.79x = 3,666,693,377.37
  5. Step 5: Solve for x
    x = 3,666,693,377.37/84,981.79
  6. Step 6: Final answer
    x = 43,146.81

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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.