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Finding the Fourth Proportional to 99,565, 137,365.66 and 63,776.56

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Solution

The fourth proportional to 99,565, 137,365.66 and 63,776.56 is: 87,989.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,565 : 137,365.66 = 63,776.56 : x
  2. Step 2: Convert to fraction form
    99,565/137,365.66 = 63,776.56/x
  3. Step 3: Cross multiply
    99,565x = 137,365.66 × 63,776.56
  4. Step 4: Simplify right side
    99,565x = 8,760,709,256.93
  5. Step 5: Solve for x
    x = 8,760,709,256.93/99,565
  6. Step 6: Final answer
    x = 87,989.85

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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.