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Finding the Fourth Proportional to 128,897.66, 177,900.14 and 75,182.67

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Solution

The fourth proportional to 128,897.66, 177,900.14 and 75,182.67 is: 103,764.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,897.66 : 177,900.14 = 75,182.67 : x
  2. Step 2: Convert to fraction form
    128,897.66/177,900.14 = 75,182.67/x
  3. Step 3: Cross multiply
    128,897.66x = 177,900.14 × 75,182.67
  4. Step 4: Simplify right side
    128,897.66x = 13,375,007,518.57
  5. Step 5: Solve for x
    x = 13,375,007,518.57/128,897.66
  6. Step 6: Final answer
    x = 103,764.55

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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.