Home / 128,103.07-192,151.95-42,720.08

Finding the Fourth Proportional to 128,103.07, 192,151.95 and 42,720.08

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Solution

The fourth proportional to 128,103.07, 192,151.95 and 42,720.08 is: 64,079.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,103.07 : 192,151.95 = 42,720.08 : x
  2. Step 2: Convert to fraction form
    128,103.07/192,151.95 = 42,720.08/x
  3. Step 3: Cross multiply
    128,103.07x = 192,151.95 × 42,720.08
  4. Step 4: Simplify right side
    128,103.07x = 8,208,747,176.48
  5. Step 5: Solve for x
    x = 8,208,747,176.48/128,103.07
  6. Step 6: Final answer
    x = 64,079.24

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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.