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Finding the Fourth Proportional to 128,185.93, 176,900.15 and 70,828.95

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Solution

The fourth proportional to 128,185.93, 176,900.15 and 70,828.95 is: 97,745.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,185.93 : 176,900.15 = 70,828.95 : x
  2. Step 2: Convert to fraction form
    128,185.93/176,900.15 = 70,828.95/x
  3. Step 3: Cross multiply
    128,185.93x = 176,900.15 × 70,828.95
  4. Step 4: Simplify right side
    128,185.93x = 12,529,651,879.34
  5. Step 5: Solve for x
    x = 12,529,651,879.34/128,185.93
  6. Step 6: Final answer
    x = 97,745.92

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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.