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Finding the Fourth Proportional to 90,487.53, 124,858.71 and 51,724.80

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Solution

The fourth proportional to 90,487.53, 124,858.71 and 51,724.80 is: 71,372.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,487.53 : 124,858.71 = 51,724.80 : x
  2. Step 2: Convert to fraction form
    90,487.53/124,858.71 = 51,724.80/x
  3. Step 3: Cross multiply
    90,487.53x = 124,858.71 × 51,724.80
  4. Step 4: Simplify right side
    90,487.53x = 6,458,291,803.01
  5. Step 5: Solve for x
    x = 6,458,291,803.01/90,487.53
  6. Step 6: Final answer
    x = 71,372.17

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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.