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Finding the Fourth Proportional to 128,577.55, 192,897.12 and 53,656.02

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Solution

The fourth proportional to 128,577.55, 192,897.12 and 53,656.02 is: 80,496.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,577.55 : 192,897.12 = 53,656.02 : x
  2. Step 2: Convert to fraction form
    128,577.55/192,897.12 = 53,656.02/x
  3. Step 3: Cross multiply
    128,577.55x = 192,897.12 × 53,656.02
  4. Step 4: Simplify right side
    128,577.55x = 10,350,091,728.66
  5. Step 5: Solve for x
    x = 10,350,091,728.66/128,577.55
  6. Step 6: Final answer
    x = 80,496.88

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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.