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Finding the Fourth Proportional to 99,776.76, 137,688.48 and 59,469.77

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Solution

The fourth proportional to 99,776.76, 137,688.48 and 59,469.77 is: 82,066.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,776.76 : 137,688.48 = 59,469.77 : x
  2. Step 2: Convert to fraction form
    99,776.76/137,688.48 = 59,469.77/x
  3. Step 3: Cross multiply
    99,776.76x = 137,688.48 × 59,469.77
  4. Step 4: Simplify right side
    99,776.76x = 8,188,301,548.81
  5. Step 5: Solve for x
    x = 8,188,301,548.81/99,776.76
  6. Step 6: Final answer
    x = 82,066.22

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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.