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Finding the Fourth Proportional to 99,643.96, 137,430.87 and 63,837.28

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Solution

The fourth proportional to 99,643.96, 137,430.87 and 63,837.28 is: 88,045.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,643.96 : 137,430.87 = 63,837.28 : x
  2. Step 2: Convert to fraction form
    99,643.96/137,430.87 = 63,837.28/x
  3. Step 3: Cross multiply
    99,643.96x = 137,430.87 × 63,837.28
  4. Step 4: Simplify right side
    99,643.96x = 8,773,212,928.83
  5. Step 5: Solve for x
    x = 8,773,212,928.83/99,643.96
  6. Step 6: Final answer
    x = 88,045.61

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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.