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Finding the Fourth Proportional to 128,603.60, 193,029.90 and 62,090.40

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Solution

The fourth proportional to 128,603.60, 193,029.90 and 62,090.40 is: 93,195.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,603.60 : 193,029.90 = 62,090.40 : x
  2. Step 2: Convert to fraction form
    128,603.60/193,029.90 = 62,090.40/x
  3. Step 3: Cross multiply
    128,603.60x = 193,029.90 × 62,090.40
  4. Step 4: Simplify right side
    128,603.60x = 11,985,303,702.96
  5. Step 5: Solve for x
    x = 11,985,303,702.96/128,603.60
  6. Step 6: Final answer
    x = 93,195.71

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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.