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Finding the Fourth Proportional to 128,235.75, 176,965.41 and 71,647.13

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Solution

The fourth proportional to 128,235.75, 176,965.41 and 71,647.13 is: 98,873.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,235.75 : 176,965.41 = 71,647.13 : x
  2. Step 2: Convert to fraction form
    128,235.75/176,965.41 = 71,647.13/x
  3. Step 3: Cross multiply
    128,235.75x = 176,965.41 × 71,647.13
  4. Step 4: Simplify right side
    128,235.75x = 12,679,063,735.77
  5. Step 5: Solve for x
    x = 12,679,063,735.77/128,235.75
  6. Step 6: Final answer
    x = 98,873.08

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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.