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Finding the Fourth Proportional to 99,920.09, 137,888.05 and 54,597.08

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Solution

The fourth proportional to 99,920.09, 137,888.05 and 54,597.08 is: 75,343.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,920.09 : 137,888.05 = 54,597.08 : x
  2. Step 2: Convert to fraction form
    99,920.09/137,888.05 = 54,597.08/x
  3. Step 3: Cross multiply
    99,920.09x = 137,888.05 × 54,597.08
  4. Step 4: Simplify right side
    99,920.09x = 7,528,284,896.89
  5. Step 5: Solve for x
    x = 7,528,284,896.89/99,920.09
  6. Step 6: Final answer
    x = 75,343.06

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1.5x scale

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.