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Finding the Fourth Proportional to 105,787.80, 158,681.70 and 53,299.80

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Solution

The fourth proportional to 105,787.80, 158,681.70 and 53,299.80 is: 79,949.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,787.80 : 158,681.70 = 53,299.80 : x
  2. Step 2: Convert to fraction form
    105,787.80/158,681.70 = 53,299.80/x
  3. Step 3: Cross multiply
    105,787.80x = 158,681.70 × 53,299.80
  4. Step 4: Simplify right side
    105,787.80x = 8,457,702,873.66
  5. Step 5: Solve for x
    x = 8,457,702,873.66/105,787.80
  6. Step 6: Final answer
    x = 79,949.70

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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.