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Finding the Fourth Proportional to 69,518.86, 95,931.54 and 42,655.21

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Solution

The fourth proportional to 69,518.86, 95,931.54 and 42,655.21 is: 58,861.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,518.86 : 95,931.54 = 42,655.21 : x
  2. Step 2: Convert to fraction form
    69,518.86/95,931.54 = 42,655.21/x
  3. Step 3: Cross multiply
    69,518.86x = 95,931.54 × 42,655.21
  4. Step 4: Simplify right side
    69,518.86x = 4,091,979,744.49
  5. Step 5: Solve for x
    x = 4,091,979,744.49/69,518.86
  6. Step 6: Final answer
    x = 58,861.44

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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.