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Finding the Fourth Proportional to 48,712.40, 73,075.90 and 20,632.40

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Solution

The fourth proportional to 48,712.40, 73,075.90 and 20,632.40 is: 30,951.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,712.40 : 73,075.90 = 20,632.40 : x
  2. Step 2: Convert to fraction form
    48,712.40/73,075.90 = 20,632.40/x
  3. Step 3: Cross multiply
    48,712.40x = 73,075.90 × 20,632.40
  4. Step 4: Simplify right side
    48,712.40x = 1,507,731,199.16
  5. Step 5: Solve for x
    x = 1,507,731,199.16/48,712.40
  6. Step 6: Final answer
    x = 30,951.69

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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.