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Finding the Fourth Proportional to 101,236.77, 139,707.80 and 55,915.91

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Solution

The fourth proportional to 101,236.77, 139,707.80 and 55,915.91 is: 77,164.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,236.77 : 139,707.80 = 55,915.91 : x
  2. Step 2: Convert to fraction form
    101,236.77/139,707.80 = 55,915.91/x
  3. Step 3: Cross multiply
    101,236.77x = 139,707.80 × 55,915.91
  4. Step 4: Simplify right side
    101,236.77x = 7,811,888,771.10
  5. Step 5: Solve for x
    x = 7,811,888,771.10/101,236.77
  6. Step 6: Final answer
    x = 77,164.54

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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.