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Finding the Fourth Proportional to 89,688.80, 134,358.06 and 54,541.28

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Solution

The fourth proportional to 89,688.80, 134,358.06 and 54,541.28 is: 81,705.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,688.80 : 134,358.06 = 54,541.28 : x
  2. Step 2: Convert to fraction form
    89,688.80/134,358.06 = 54,541.28/x
  3. Step 3: Cross multiply
    89,688.80x = 134,358.06 × 54,541.28
  4. Step 4: Simplify right side
    89,688.80x = 7,328,060,570.72
  5. Step 5: Solve for x
    x = 7,328,060,570.72/89,688.80
  6. Step 6: Final answer
    x = 81,705.41

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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.