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Finding the Fourth Proportional to 60,486.40, 90,737.70 and 21,055.60

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Solution

The fourth proportional to 60,486.40, 90,737.70 and 21,055.60 is: 31,586.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,486.40 : 90,737.70 = 21,055.60 : x
  2. Step 2: Convert to fraction form
    60,486.40/90,737.70 = 21,055.60/x
  3. Step 3: Cross multiply
    60,486.40x = 90,737.70 × 21,055.60
  4. Step 4: Simplify right side
    60,486.40x = 1,910,536,716.12
  5. Step 5: Solve for x
    x = 1,910,536,716.12/60,486.40
  6. Step 6: Final answer
    x = 31,586.22

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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.