Home / 128,145.17-192,145.77-53,214.91

Finding the Fourth Proportional to 128,145.17, 192,145.77 and 53,214.91

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Solution

The fourth proportional to 128,145.17, 192,145.77 and 53,214.91 is: 79,792.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,145.17 : 192,145.77 = 53,214.91 : x
  2. Step 2: Convert to fraction form
    128,145.17/192,145.77 = 53,214.91/x
  3. Step 3: Cross multiply
    128,145.17x = 192,145.77 × 53,214.91
  4. Step 4: Simplify right side
    128,145.17x = 10,225,019,377.07
  5. Step 5: Solve for x
    x = 10,225,019,377.07/128,145.17
  6. Step 6: Final answer
    x = 79,792.47

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1.5x scale

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.