Home / 85,890.20-128,703.89-45,914.87

Finding the Fourth Proportional to 85,890.20, 128,703.89 and 45,914.87

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Solution

The fourth proportional to 85,890.20, 128,703.89 and 45,914.87 is: 68,802.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,890.20 : 128,703.89 = 45,914.87 : x
  2. Step 2: Convert to fraction form
    85,890.20/128,703.89 = 45,914.87/x
  3. Step 3: Cross multiply
    85,890.20x = 128,703.89 × 45,914.87
  4. Step 4: Simplify right side
    85,890.20x = 5,909,421,504.75
  5. Step 5: Solve for x
    x = 5,909,421,504.75/85,890.20
  6. Step 6: Final answer
    x = 68,802.05

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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.