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Finding the Fourth Proportional to 101,001.78, 139,383.42 and 55,681.53

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Solution

The fourth proportional to 101,001.78, 139,383.42 and 55,681.53 is: 76,841.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,001.78 : 139,383.42 = 55,681.53 : x
  2. Step 2: Convert to fraction form
    101,001.78/139,383.42 = 55,681.53/x
  3. Step 3: Cross multiply
    101,001.78x = 139,383.42 × 55,681.53
  4. Step 4: Simplify right side
    101,001.78x = 7,761,082,082.23
  5. Step 5: Solve for x
    x = 7,761,082,082.23/101,001.78
  6. Step 6: Final answer
    x = 76,841.04

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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.