Home / 99,128.09-136,793.10-53,805.10

Finding the Fourth Proportional to 99,128.09, 136,793.10 and 53,805.10

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Solution

The fourth proportional to 99,128.09, 136,793.10 and 53,805.10 is: 74,249.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,128.09 : 136,793.10 = 53,805.10 : x
  2. Step 2: Convert to fraction form
    99,128.09/136,793.10 = 53,805.10/x
  3. Step 3: Cross multiply
    99,128.09x = 136,793.10 × 53,805.10
  4. Step 4: Simplify right side
    99,128.09x = 7,360,166,424.81
  5. Step 5: Solve for x
    x = 7,360,166,424.81/99,128.09
  6. Step 6: Final answer
    x = 74,249.05

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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.