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Finding the Fourth Proportional to 82,539.60, 123,809.40 and 20,210.10

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Solution

The fourth proportional to 82,539.60, 123,809.40 and 20,210.10 is: 30,315.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,539.60 : 123,809.40 = 20,210.10 : x
  2. Step 2: Convert to fraction form
    82,539.60/123,809.40 = 20,210.10/x
  3. Step 3: Cross multiply
    82,539.60x = 123,809.40 × 20,210.10
  4. Step 4: Simplify right side
    82,539.60x = 2,502,200,354.94
  5. Step 5: Solve for x
    x = 2,502,200,354.94/82,539.60
  6. Step 6: Final answer
    x = 30,315.15

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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.