Home / 128,774.30-177,707.98-72,185.68

Finding the Fourth Proportional to 128,774.30, 177,707.98 and 72,185.68

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Solution

The fourth proportional to 128,774.30, 177,707.98 and 72,185.68 is: 99,615.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,774.30 : 177,707.98 = 72,185.68 : x
  2. Step 2: Convert to fraction form
    128,774.30/177,707.98 = 72,185.68/x
  3. Step 3: Cross multiply
    128,774.30x = 177,707.98 × 72,185.68
  4. Step 4: Simplify right side
    128,774.30x = 12,827,971,377.73
  5. Step 5: Solve for x
    x = 12,827,971,377.73/128,774.30
  6. Step 6: Final answer
    x = 99,615.93

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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.