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Finding the Fourth Proportional to 128,503.16, 192,672.48 and 61,810.46

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Solution

The fourth proportional to 128,503.16, 192,672.48 and 61,810.46 is: 92,676.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,503.16 : 192,672.48 = 61,810.46 : x
  2. Step 2: Convert to fraction form
    128,503.16/192,672.48 = 61,810.46/x
  3. Step 3: Cross multiply
    128,503.16x = 192,672.48 × 61,810.46
  4. Step 4: Simplify right side
    128,503.16x = 11,909,174,618.14
  5. Step 5: Solve for x
    x = 11,909,174,618.14/128,503.16
  6. Step 6: Final answer
    x = 92,676.12

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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.