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Finding the Fourth Proportional to 98,860.80, 136,428.57 and 53,538.81

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Solution

The fourth proportional to 98,860.80, 136,428.57 and 53,538.81 is: 73,883.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,860.80 : 136,428.57 = 53,538.81 : x
  2. Step 2: Convert to fraction form
    98,860.80/136,428.57 = 53,538.81/x
  3. Step 3: Cross multiply
    98,860.80x = 136,428.57 × 53,538.81
  4. Step 4: Simplify right side
    98,860.80x = 7,304,222,776.19
  5. Step 5: Solve for x
    x = 7,304,222,776.19/98,860.80
  6. Step 6: Final answer
    x = 73,883.91

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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.