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Finding the Fourth Proportional to 54,503.40, 81,757.80 and 28,259.40

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Solution

The fourth proportional to 54,503.40, 81,757.80 and 28,259.40 is: 42,390.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,503.40 : 81,757.80 = 28,259.40 : x
  2. Step 2: Convert to fraction form
    54,503.40/81,757.80 = 28,259.40/x
  3. Step 3: Cross multiply
    54,503.40x = 81,757.80 × 28,259.40
  4. Step 4: Simplify right side
    54,503.40x = 2,310,426,373.32
  5. Step 5: Solve for x
    x = 2,310,426,373.32/54,503.40
  6. Step 6: Final answer
    x = 42,390.50

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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.