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Finding the Fourth Proportional to 66,128.64, 99,192.93 and 16,880.64

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Solution

The fourth proportional to 66,128.64, 99,192.93 and 16,880.64 is: 25,320.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,128.64 : 99,192.93 = 16,880.64 : x
  2. Step 2: Convert to fraction form
    66,128.64/99,192.93 = 16,880.64/x
  3. Step 3: Cross multiply
    66,128.64x = 99,192.93 × 16,880.64
  4. Step 4: Simplify right side
    66,128.64x = 1,674,440,141.88
  5. Step 5: Solve for x
    x = 1,674,440,141.88/66,128.64
  6. Step 6: Final answer
    x = 25,320.95

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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.