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Finding the Fourth Proportional to 67,303.68, 100,969.92 and 20,560

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Solution

The fourth proportional to 67,303.68, 100,969.92 and 20,560 is: 30,844.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,303.68 : 100,969.92 = 20,560 : x
  2. Step 2: Convert to fraction form
    67,303.68/100,969.92 = 20,560/x
  3. Step 3: Cross multiply
    67,303.68x = 100,969.92 × 20,560
  4. Step 4: Simplify right side
    67,303.68x = 2,075,941,555.20
  5. Step 5: Solve for x
    x = 2,075,941,555.20/67,303.68
  6. Step 6: Final answer
    x = 30,844.40

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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.