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Finding the Fourth Proportional to 56,670.80, 85,006.20 and 30,426.80

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Solution

The fourth proportional to 56,670.80, 85,006.20 and 30,426.80 is: 45,640.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,670.80 : 85,006.20 = 30,426.80 : x
  2. Step 2: Convert to fraction form
    56,670.80/85,006.20 = 30,426.80/x
  3. Step 3: Cross multiply
    56,670.80x = 85,006.20 × 30,426.80
  4. Step 4: Simplify right side
    56,670.80x = 2,586,466,646.16
  5. Step 5: Solve for x
    x = 2,586,466,646.16/56,670.80
  6. Step 6: Final answer
    x = 45,640.20

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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.