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Finding the Fourth Proportional to 52,552.40, 78,838.20 and 21,390.80

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Solution

The fourth proportional to 52,552.40, 78,838.20 and 21,390.80 is: 32,090.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,552.40 : 78,838.20 = 21,390.80 : x
  2. Step 2: Convert to fraction form
    52,552.40/78,838.20 = 21,390.80/x
  3. Step 3: Cross multiply
    52,552.40x = 78,838.20 × 21,390.80
  4. Step 4: Simplify right side
    52,552.40x = 1,686,412,168.56
  5. Step 5: Solve for x
    x = 1,686,412,168.56/52,552.40
  6. Step 6: Final answer
    x = 32,090.11

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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.