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Finding the Fourth Proportional to 89,500.54, 123,480 and 55,496.78

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Solution

The fourth proportional to 89,500.54, 123,480 and 55,496.78 is: 76,566.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,500.54 : 123,480 = 55,496.78 : x
  2. Step 2: Convert to fraction form
    89,500.54/123,480 = 55,496.78/x
  3. Step 3: Cross multiply
    89,500.54x = 123,480 × 55,496.78
  4. Step 4: Simplify right side
    89,500.54x = 6,852,742,394.40
  5. Step 5: Solve for x
    x = 6,852,742,394.40/89,500.54
  6. Step 6: Final answer
    x = 76,566.49

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1.5x scale

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.