Home / 135,433.38-201,720.12-128,320.77

Finding the Fourth Proportional to 135,433.38, 201,720.12 and 128,320.77

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Solution

The fourth proportional to 135,433.38, 201,720.12 and 128,320.77 is: 191,126.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,433.38 : 201,720.12 = 128,320.77 : x
  2. Step 2: Convert to fraction form
    135,433.38/201,720.12 = 128,320.77/x
  3. Step 3: Cross multiply
    135,433.38x = 201,720.12 × 128,320.77
  4. Step 4: Simplify right side
    135,433.38x = 25,884,881,122.89
  5. Step 5: Solve for x
    x = 25,884,881,122.89/135,433.38
  6. Step 6: Final answer
    x = 191,126.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.