Home / 128,734.16-193,130.64-45,628.16

Finding the Fourth Proportional to 128,734.16, 193,130.64 and 45,628.16

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Solution

The fourth proportional to 128,734.16, 193,130.64 and 45,628.16 is: 68,452.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,734.16 : 193,130.64 = 45,628.16 : x
  2. Step 2: Convert to fraction form
    128,734.16/193,130.64 = 45,628.16/x
  3. Step 3: Cross multiply
    128,734.16x = 193,130.64 × 45,628.16
  4. Step 4: Simplify right side
    128,734.16x = 8,812,195,742.82
  5. Step 5: Solve for x
    x = 8,812,195,742.82/128,734.16
  6. Step 6: Final answer
    x = 68,452.66

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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.