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Finding the Fourth Proportional to 101,749.51, 140,421.54 and 56,431.83

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Solution

The fourth proportional to 101,749.51, 140,421.54 and 56,431.83 is: 77,879.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,749.51 : 140,421.54 = 56,431.83 : x
  2. Step 2: Convert to fraction form
    101,749.51/140,421.54 = 56,431.83/x
  3. Step 3: Cross multiply
    101,749.51x = 140,421.54 × 56,431.83
  4. Step 4: Simplify right side
    101,749.51x = 7,924,244,473.62
  5. Step 5: Solve for x
    x = 7,924,244,473.62/101,749.51
  6. Step 6: Final answer
    x = 77,879.93

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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.