Home / 87,220.18-120,323.64-51,385.78

Finding the Fourth Proportional to 87,220.18, 120,323.64 and 51,385.78

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Solution

The fourth proportional to 87,220.18, 120,323.64 and 51,385.78 is: 70,888.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,220.18 : 120,323.64 = 51,385.78 : x
  2. Step 2: Convert to fraction form
    87,220.18/120,323.64 = 51,385.78/x
  3. Step 3: Cross multiply
    87,220.18x = 120,323.64 × 51,385.78
  4. Step 4: Simplify right side
    87,220.18x = 6,182,924,093.84
  5. Step 5: Solve for x
    x = 6,182,924,093.84/87,220.18
  6. Step 6: Final answer
    x = 70,888.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.