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Finding the Fourth Proportional to 107,947.80, 161,775.90 and 72,307.80

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Solution

The fourth proportional to 107,947.80, 161,775.90 and 72,307.80 is: 108,364.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,947.80 : 161,775.90 = 72,307.80 : x
  2. Step 2: Convert to fraction form
    107,947.80/161,775.90 = 72,307.80/x
  3. Step 3: Cross multiply
    107,947.80x = 161,775.90 × 72,307.80
  4. Step 4: Simplify right side
    107,947.80x = 11,697,659,422.02
  5. Step 5: Solve for x
    x = 11,697,659,422.02/107,947.80
  6. Step 6: Final answer
    x = 108,364.04

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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.