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Finding the Fourth Proportional to 82,879.80, 124,368.30 and 30,294.60

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Solution

The fourth proportional to 82,879.80, 124,368.30 and 30,294.60 is: 45,459.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,879.80 : 124,368.30 = 30,294.60 : x
  2. Step 2: Convert to fraction form
    82,879.80/124,368.30 = 30,294.60/x
  3. Step 3: Cross multiply
    82,879.80x = 124,368.30 × 30,294.60
  4. Step 4: Simplify right side
    82,879.80x = 3,767,687,901.18
  5. Step 5: Solve for x
    x = 3,767,687,901.18/82,879.80
  6. Step 6: Final answer
    x = 45,459.66

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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.