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Finding the Fourth Proportional to 52,405.80, 78,608.70 and 47,221.80

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Solution

The fourth proportional to 52,405.80, 78,608.70 and 47,221.80 is: 70,832.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,405.80 : 78,608.70 = 47,221.80 : x
  2. Step 2: Convert to fraction form
    52,405.80/78,608.70 = 47,221.80/x
  3. Step 3: Cross multiply
    52,405.80x = 78,608.70 × 47,221.80
  4. Step 4: Simplify right side
    52,405.80x = 3,712,044,309.66
  5. Step 5: Solve for x
    x = 3,712,044,309.66/52,405.80
  6. Step 6: Final answer
    x = 70,832.70

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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.