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Finding the Fourth Proportional to 92,721.60, 127,955.76 and 50,280

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Solution

The fourth proportional to 92,721.60, 127,955.76 and 50,280 is: 69,386.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,721.60 : 127,955.76 = 50,280 : x
  2. Step 2: Convert to fraction form
    92,721.60/127,955.76 = 50,280/x
  3. Step 3: Cross multiply
    92,721.60x = 127,955.76 × 50,280
  4. Step 4: Simplify right side
    92,721.60x = 6,433,615,612.80
  5. Step 5: Solve for x
    x = 6,433,615,612.80/92,721.60
  6. Step 6: Final answer
    x = 69,386.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.