Home / 85,406.50-128,187.49-45,459.02

Finding the Fourth Proportional to 85,406.50, 128,187.49 and 45,459.02

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Solution

The fourth proportional to 85,406.50, 128,187.49 and 45,459.02 is: 68,229.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,406.50 : 128,187.49 = 45,459.02 : x
  2. Step 2: Convert to fraction form
    85,406.50/128,187.49 = 45,459.02/x
  3. Step 3: Cross multiply
    85,406.50x = 128,187.49 × 45,459.02
  4. Step 4: Simplify right side
    85,406.50x = 5,827,277,671.66
  5. Step 5: Solve for x
    x = 5,827,277,671.66/85,406.50
  6. Step 6: Final answer
    x = 68,229.91

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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.