Home / 128,860.13-177,904.73-84,225.89

Finding the Fourth Proportional to 128,860.13, 177,904.73 and 84,225.89

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Solution

The fourth proportional to 128,860.13, 177,904.73 and 84,225.89 is: 116,282.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,860.13 : 177,904.73 = 84,225.89 : x
  2. Step 2: Convert to fraction form
    128,860.13/177,904.73 = 84,225.89/x
  3. Step 3: Cross multiply
    128,860.13x = 177,904.73 × 84,225.89
  4. Step 4: Simplify right side
    128,860.13x = 14,984,183,540.50
  5. Step 5: Solve for x
    x = 14,984,183,540.50/128,860.13
  6. Step 6: Final answer
    x = 116,282.55

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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.