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Finding the Fourth Proportional to 85,780.50, 128,669.79 and 35,168.23

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Solution

The fourth proportional to 85,780.50, 128,669.79 and 35,168.23 is: 52,751.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,780.50 : 128,669.79 = 35,168.23 : x
  2. Step 2: Convert to fraction form
    85,780.50/128,669.79 = 35,168.23/x
  3. Step 3: Cross multiply
    85,780.50x = 128,669.79 × 35,168.23
  4. Step 4: Simplify right side
    85,780.50x = 4,525,088,768.77
  5. Step 5: Solve for x
    x = 4,525,088,768.77/85,780.50
  6. Step 6: Final answer
    x = 52,751.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.