Home / 102,071.52-140,865.03-56,749.86

Finding the Fourth Proportional to 102,071.52, 140,865.03 and 56,749.86

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Solution

The fourth proportional to 102,071.52, 140,865.03 and 56,749.86 is: 78,318.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,071.52 : 140,865.03 = 56,749.86 : x
  2. Step 2: Convert to fraction form
    102,071.52/140,865.03 = 56,749.86/x
  3. Step 3: Cross multiply
    102,071.52x = 140,865.03 × 56,749.86
  4. Step 4: Simplify right side
    102,071.52x = 7,994,070,731.40
  5. Step 5: Solve for x
    x = 7,994,070,731.40/102,071.52
  6. Step 6: Final answer
    x = 78,318.33

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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.