Home / 65,999.12-99,000.30-21,666.20

Finding the Fourth Proportional to 65,999.12, 99,000.30 and 21,666.20

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Solution

The fourth proportional to 65,999.12, 99,000.30 and 21,666.20 is: 32,499.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,999.12 : 99,000.30 = 21,666.20 : x
  2. Step 2: Convert to fraction form
    65,999.12/99,000.30 = 21,666.20/x
  3. Step 3: Cross multiply
    65,999.12x = 99,000.30 × 21,666.20
  4. Step 4: Simplify right side
    65,999.12x = 2,144,960,299.86
  5. Step 5: Solve for x
    x = 2,144,960,299.86/65,999.12
  6. Step 6: Final answer
    x = 32,499.83

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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.