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Finding the Fourth Proportional to 128,307.78, 192,494.48 and 53,403.03

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Solution

The fourth proportional to 128,307.78, 192,494.48 and 53,403.03 is: 80,118.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,307.78 : 192,494.48 = 53,403.03 : x
  2. Step 2: Convert to fraction form
    128,307.78/192,494.48 = 53,403.03/x
  3. Step 3: Cross multiply
    128,307.78x = 192,494.48 × 53,403.03
  4. Step 4: Simplify right side
    128,307.78x = 10,279,788,223.26
  5. Step 5: Solve for x
    x = 10,279,788,223.26/128,307.78
  6. Step 6: Final answer
    x = 80,118.20

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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.