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Finding the Fourth Proportional to 128,693.13, 192,985.02 and 69,512.91

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Solution

The fourth proportional to 128,693.13, 192,985.02 and 69,512.91 is: 104,239.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,693.13 : 192,985.02 = 69,512.91 : x
  2. Step 2: Convert to fraction form
    128,693.13/192,985.02 = 69,512.91/x
  3. Step 3: Cross multiply
    128,693.13x = 192,985.02 × 69,512.91
  4. Step 4: Simplify right side
    128,693.13x = 13,414,950,326.61
  5. Step 5: Solve for x
    x = 13,414,950,326.61/128,693.13
  6. Step 6: Final answer
    x = 104,239.83

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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.