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Finding the Fourth Proportional to 128,649.70, 193,002.90 and 43,257.64

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Solution

The fourth proportional to 128,649.70, 193,002.90 and 43,257.64 is: 64,895.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,649.70 : 193,002.90 = 43,257.64 : x
  2. Step 2: Convert to fraction form
    128,649.70/193,002.90 = 43,257.64/x
  3. Step 3: Cross multiply
    128,649.70x = 193,002.90 × 43,257.64
  4. Step 4: Simplify right side
    128,649.70x = 8,348,849,967.16
  5. Step 5: Solve for x
    x = 8,348,849,967.16/128,649.70
  6. Step 6: Final answer
    x = 64,895.99

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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.