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Finding the Fourth Proportional to 134,720.70, 201,735.45 and 128,499.90

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Solution

The fourth proportional to 134,720.70, 201,735.45 and 128,499.90 is: 192,420.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,720.70 : 201,735.45 = 128,499.90 : x
  2. Step 2: Convert to fraction form
    134,720.70/201,735.45 = 128,499.90/x
  3. Step 3: Cross multiply
    134,720.70x = 201,735.45 × 128,499.90
  4. Step 4: Simplify right side
    134,720.70x = 25,922,985,151.46
  5. Step 5: Solve for x
    x = 25,922,985,151.46/134,720.70
  6. Step 6: Final answer
    x = 192,420.21

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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.