Home / 100,699.02-138,965.53-54,758.81

Finding the Fourth Proportional to 100,699.02, 138,965.53 and 54,758.81

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Solution

The fourth proportional to 100,699.02, 138,965.53 and 54,758.81 is: 75,567.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,699.02 : 138,965.53 = 54,758.81 : x
  2. Step 2: Convert to fraction form
    100,699.02/138,965.53 = 54,758.81/x
  3. Step 3: Cross multiply
    100,699.02x = 138,965.53 × 54,758.81
  4. Step 4: Simplify right side
    100,699.02x = 7,609,587,053.82
  5. Step 5: Solve for x
    x = 7,609,587,053.82/100,699.02
  6. Step 6: Final answer
    x = 75,567.64

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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.