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Finding the Fourth Proportional to 60,603.52, 90,905.94 and 21,160.72

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Solution

The fourth proportional to 60,603.52, 90,905.94 and 21,160.72 is: 31,741.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,603.52 : 90,905.94 = 21,160.72 : x
  2. Step 2: Convert to fraction form
    60,603.52/90,905.94 = 21,160.72/x
  3. Step 3: Cross multiply
    60,603.52x = 90,905.94 × 21,160.72
  4. Step 4: Simplify right side
    60,603.52x = 1,923,635,142.68
  5. Step 5: Solve for x
    x = 1,923,635,142.68/60,603.52
  6. Step 6: Final answer
    x = 31,741.31

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1.5x scale

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.