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Finding the Fourth Proportional to 60,533.88, 90,809.28 and 21,085.20

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Solution

The fourth proportional to 60,533.88, 90,809.28 and 21,085.20 is: 31,630.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,533.88 : 90,809.28 = 21,085.20 : x
  2. Step 2: Convert to fraction form
    60,533.88/90,809.28 = 21,085.20/x
  3. Step 3: Cross multiply
    60,533.88x = 90,809.28 × 21,085.20
  4. Step 4: Simplify right side
    60,533.88x = 1,914,731,830.66
  5. Step 5: Solve for x
    x = 1,914,731,830.66/60,533.88
  6. Step 6: Final answer
    x = 31,630.75

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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.