Home / 128,929.24-177,919.54-71,565.22

Finding the Fourth Proportional to 128,929.24, 177,919.54 and 71,565.22

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Solution

The fourth proportional to 128,929.24, 177,919.54 and 71,565.22 is: 98,758.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,929.24 : 177,919.54 = 71,565.22 : x
  2. Step 2: Convert to fraction form
    128,929.24/177,919.54 = 71,565.22/x
  3. Step 3: Cross multiply
    128,929.24x = 177,919.54 × 71,565.22
  4. Step 4: Simplify right side
    128,929.24x = 12,732,851,022.40
  5. Step 5: Solve for x
    x = 12,732,851,022.40/128,929.24
  6. Step 6: Final answer
    x = 98,758.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.