Home / 76,787.20-105,959.10-42,792.40

Finding the Fourth Proportional to 76,787.20, 105,959.10 and 42,792.40

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Solution

The fourth proportional to 76,787.20, 105,959.10 and 42,792.40 is: 59,049.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,787.20 : 105,959.10 = 42,792.40 : x
  2. Step 2: Convert to fraction form
    76,787.20/105,959.10 = 42,792.40/x
  3. Step 3: Cross multiply
    76,787.20x = 105,959.10 × 42,792.40
  4. Step 4: Simplify right side
    76,787.20x = 4,534,244,190.84
  5. Step 5: Solve for x
    x = 4,534,244,190.84/76,787.20
  6. Step 6: Final answer
    x = 59,049.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.