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Finding the Fourth Proportional to 99,230.50, 136,939.53 and 53,909.29

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Solution

The fourth proportional to 99,230.50, 136,939.53 and 53,909.29 is: 74,395.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,230.50 : 136,939.53 = 53,909.29 : x
  2. Step 2: Convert to fraction form
    99,230.50/136,939.53 = 53,909.29/x
  3. Step 3: Cross multiply
    99,230.50x = 136,939.53 × 53,909.29
  4. Step 4: Simplify right side
    99,230.50x = 7,382,312,835.23
  5. Step 5: Solve for x
    x = 7,382,312,835.23/99,230.50
  6. Step 6: Final answer
    x = 74,395.60

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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.