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Finding the Fourth Proportional to 57,787.20, 86,680.80 and 52,430.40

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Solution

The fourth proportional to 57,787.20, 86,680.80 and 52,430.40 is: 78,645.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,787.20 : 86,680.80 = 52,430.40 : x
  2. Step 2: Convert to fraction form
    57,787.20/86,680.80 = 52,430.40/x
  3. Step 3: Cross multiply
    57,787.20x = 86,680.80 × 52,430.40
  4. Step 4: Simplify right side
    57,787.20x = 4,544,709,016.32
  5. Step 5: Solve for x
    x = 4,544,709,016.32/57,787.20
  6. Step 6: Final answer
    x = 78,645.60

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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.