Home / 289,090.20-433,635.30-78,727.80

Finding the Fourth Proportional to 289,090.20, 433,635.30 and 78,727.80

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Solution

The fourth proportional to 289,090.20, 433,635.30 and 78,727.80 is: 118,091.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,090.20 : 433,635.30 = 78,727.80 : x
  2. Step 2: Convert to fraction form
    289,090.20/433,635.30 = 78,727.80/x
  3. Step 3: Cross multiply
    289,090.20x = 433,635.30 × 78,727.80
  4. Step 4: Simplify right side
    289,090.20x = 34,139,153,171.34
  5. Step 5: Solve for x
    x = 34,139,153,171.34/289,090.20
  6. Step 6: Final answer
    x = 118,091.70

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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.