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Finding the Fourth Proportional to 128,499.96, 177,348.50 and 74,041.70

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Solution

The fourth proportional to 128,499.96, 177,348.50 and 74,041.70 is: 102,188.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,499.96 : 177,348.50 = 74,041.70 : x
  2. Step 2: Convert to fraction form
    128,499.96/177,348.50 = 74,041.70/x
  3. Step 3: Cross multiply
    128,499.96x = 177,348.50 × 74,041.70
  4. Step 4: Simplify right side
    128,499.96x = 13,131,184,432.45
  5. Step 5: Solve for x
    x = 13,131,184,432.45/128,499.96
  6. Step 6: Final answer
    x = 102,188.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.