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Finding the Fourth Proportional to 54,200.80, 81,398.40 and 39,426.40

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Solution

The fourth proportional to 54,200.80, 81,398.40 and 39,426.40 is: 59,210.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,200.80 : 81,398.40 = 39,426.40 : x
  2. Step 2: Convert to fraction form
    54,200.80/81,398.40 = 39,426.40/x
  3. Step 3: Cross multiply
    54,200.80x = 81,398.40 × 39,426.40
  4. Step 4: Simplify right side
    54,200.80x = 3,209,245,877.76
  5. Step 5: Solve for x
    x = 3,209,245,877.76/54,200.80
  6. Step 6: Final answer
    x = 59,210.30

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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.