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Finding the Fourth Proportional to 92,991.63, 128,276.83 and 60,680.53

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Solution

The fourth proportional to 92,991.63, 128,276.83 and 60,680.53 is: 83,705.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,991.63 : 128,276.83 = 60,680.53 : x
  2. Step 2: Convert to fraction form
    92,991.63/128,276.83 = 60,680.53/x
  3. Step 3: Cross multiply
    92,991.63x = 128,276.83 × 60,680.53
  4. Step 4: Simplify right side
    92,991.63x = 7,783,906,031.12
  5. Step 5: Solve for x
    x = 7,783,906,031.12/92,991.63
  6. Step 6: Final answer
    x = 83,705.45

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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.