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Finding the Fourth Proportional to 101,538.58, 140,128.40 and 56,221.55

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Solution

The fourth proportional to 101,538.58, 140,128.40 and 56,221.55 is: 77,588.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,538.58 : 140,128.40 = 56,221.55 : x
  2. Step 2: Convert to fraction form
    101,538.58/140,128.40 = 56,221.55/x
  3. Step 3: Cross multiply
    101,538.58x = 140,128.40 × 56,221.55
  4. Step 4: Simplify right side
    101,538.58x = 7,878,234,865.27
  5. Step 5: Solve for x
    x = 7,878,234,865.27/101,538.58
  6. Step 6: Final answer
    x = 77,588.59

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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.