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Finding the Fourth Proportional to 89,790.80, 134,686.87 and 39,857.47

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Solution

The fourth proportional to 89,790.80, 134,686.87 and 39,857.47 is: 59,786.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,790.80 : 134,686.87 = 39,857.47 : x
  2. Step 2: Convert to fraction form
    89,790.80/134,686.87 = 39,857.47/x
  3. Step 3: Cross multiply
    89,790.80x = 134,686.87 × 39,857.47
  4. Step 4: Simplify right side
    89,790.80x = 5,368,277,808.70
  5. Step 5: Solve for x
    x = 5,368,277,808.70/89,790.80
  6. Step 6: Final answer
    x = 59,786.50

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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.