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Finding the Fourth Proportional to 128,807.60, 193,189.50 and 34,038.86

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Solution

The fourth proportional to 128,807.60, 193,189.50 and 34,038.86 is: 51,052.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,807.60 : 193,189.50 = 34,038.86 : x
  2. Step 2: Convert to fraction form
    128,807.60/193,189.50 = 34,038.86/x
  3. Step 3: Cross multiply
    128,807.60x = 193,189.50 × 34,038.86
  4. Step 4: Simplify right side
    128,807.60x = 6,575,950,343.97
  5. Step 5: Solve for x
    x = 6,575,950,343.97/128,807.60
  6. Step 6: Final answer
    x = 51,052.50

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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.