Home / 52,108.88-78,162.20-12,666.20

Finding the Fourth Proportional to 52,108.88, 78,162.20 and 12,666.20

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Solution

The fourth proportional to 52,108.88, 78,162.20 and 12,666.20 is: 18,999.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,108.88 : 78,162.20 = 12,666.20 : x
  2. Step 2: Convert to fraction form
    52,108.88/78,162.20 = 12,666.20/x
  3. Step 3: Cross multiply
    52,108.88x = 78,162.20 × 12,666.20
  4. Step 4: Simplify right side
    52,108.88x = 990,018,057.64
  5. Step 5: Solve for x
    x = 990,018,057.64/52,108.88
  6. Step 6: Final answer
    x = 18,999.03

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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.