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Finding the Fourth Proportional to 68,023.68, 101,931.68 and 28,559.40

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Solution

The fourth proportional to 68,023.68, 101,931.68 and 28,559.40 is: 42,795.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,023.68 : 101,931.68 = 28,559.40 : x
  2. Step 2: Convert to fraction form
    68,023.68/101,931.68 = 28,559.40/x
  3. Step 3: Cross multiply
    68,023.68x = 101,931.68 × 28,559.40
  4. Step 4: Simplify right side
    68,023.68x = 2,911,107,621.79
  5. Step 5: Solve for x
    x = 2,911,107,621.79/68,023.68
  6. Step 6: Final answer
    x = 42,795.50

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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.