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Finding the Fourth Proportional to 99,643.70, 137,430.54 and 63,837.04

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Solution

The fourth proportional to 99,643.70, 137,430.54 and 63,837.04 is: 88,045.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,643.70 : 137,430.54 = 63,837.04 : x
  2. Step 2: Convert to fraction form
    99,643.70/137,430.54 = 63,837.04/x
  3. Step 3: Cross multiply
    99,643.70x = 137,430.54 × 63,837.04
  4. Step 4: Simplify right side
    99,643.70x = 8,773,158,535.63
  5. Step 5: Solve for x
    x = 8,773,158,535.63/99,643.70
  6. Step 6: Final answer
    x = 88,045.30

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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.