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Finding the Fourth Proportional to 128,074.73, 176,745.91 and 70,713.86

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Solution

The fourth proportional to 128,074.73, 176,745.91 and 70,713.86 is: 97,586.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,074.73 : 176,745.91 = 70,713.86 : x
  2. Step 2: Convert to fraction form
    128,074.73/176,745.91 = 70,713.86/x
  3. Step 3: Cross multiply
    128,074.73x = 176,745.91 × 70,713.86
  4. Step 4: Simplify right side
    128,074.73x = 12,498,385,535.31
  5. Step 5: Solve for x
    x = 12,498,385,535.31/128,074.73
  6. Step 6: Final answer
    x = 97,586.66

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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.