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Finding the Fourth Proportional to 54,970.80, 82,456.20 and 51,690.30

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Solution

The fourth proportional to 54,970.80, 82,456.20 and 51,690.30 is: 77,535.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,970.80 : 82,456.20 = 51,690.30 : x
  2. Step 2: Convert to fraction form
    54,970.80/82,456.20 = 51,690.30/x
  3. Step 3: Cross multiply
    54,970.80x = 82,456.20 × 51,690.30
  4. Step 4: Simplify right side
    54,970.80x = 4,262,185,714.86
  5. Step 5: Solve for x
    x = 4,262,185,714.86/54,970.80
  6. Step 6: Final answer
    x = 77,535.45

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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.