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Finding the Fourth Proportional to 82,630.80, 123,800.40 and 51,429.60

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Solution

The fourth proportional to 82,630.80, 123,800.40 and 51,429.60 is: 77,053.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,630.80 : 123,800.40 = 51,429.60 : x
  2. Step 2: Convert to fraction form
    82,630.80/123,800.40 = 51,429.60/x
  3. Step 3: Cross multiply
    82,630.80x = 123,800.40 × 51,429.60
  4. Step 4: Simplify right side
    82,630.80x = 6,367,005,051.84
  5. Step 5: Solve for x
    x = 6,367,005,051.84/82,630.80
  6. Step 6: Final answer
    x = 77,053.65

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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.