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Finding the Fourth Proportional to 77,968.67, 107,596.84 and 42,158.67

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Solution

The fourth proportional to 77,968.67, 107,596.84 and 42,158.67 is: 58,179.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,968.67 : 107,596.84 = 42,158.67 : x
  2. Step 2: Convert to fraction form
    77,968.67/107,596.84 = 42,158.67/x
  3. Step 3: Cross multiply
    77,968.67x = 107,596.84 × 42,158.67
  4. Step 4: Simplify right side
    77,968.67x = 4,536,139,565.21
  5. Step 5: Solve for x
    x = 4,536,139,565.21/77,968.67
  6. Step 6: Final answer
    x = 58,179.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.