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Finding the Fourth Proportional to 60,720.64, 91,093.92 and 21,280.16

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Solution

The fourth proportional to 60,720.64, 91,093.92 and 21,280.16 is: 31,924.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,720.64 : 91,093.92 = 21,280.16 : x
  2. Step 2: Convert to fraction form
    60,720.64/91,093.92 = 21,280.16/x
  3. Step 3: Cross multiply
    60,720.64x = 91,093.92 × 21,280.16
  4. Step 4: Simplify right side
    60,720.64x = 1,938,493,192.63
  5. Step 5: Solve for x
    x = 1,938,493,192.63/60,720.64
  6. Step 6: Final answer
    x = 31,924.78

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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.