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Finding the Fourth Proportional to 82,810.80, 124,216.20 and 47,721.60

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Solution

The fourth proportional to 82,810.80, 124,216.20 and 47,721.60 is: 71,582.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,810.80 : 124,216.20 = 47,721.60 : x
  2. Step 2: Convert to fraction form
    82,810.80/124,216.20 = 47,721.60/x
  3. Step 3: Cross multiply
    82,810.80x = 124,216.20 × 47,721.60
  4. Step 4: Simplify right side
    82,810.80x = 5,927,795,809.92
  5. Step 5: Solve for x
    x = 5,927,795,809.92/82,810.80
  6. Step 6: Final answer
    x = 71,582.40

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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.