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Finding the Fourth Proportional to 78,125.88, 107,820.30 and 44,140.56

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Solution

The fourth proportional to 78,125.88, 107,820.30 and 44,140.56 is: 60,917.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,125.88 : 107,820.30 = 44,140.56 : x
  2. Step 2: Convert to fraction form
    78,125.88/107,820.30 = 44,140.56/x
  3. Step 3: Cross multiply
    78,125.88x = 107,820.30 × 44,140.56
  4. Step 4: Simplify right side
    78,125.88x = 4,759,248,421.37
  5. Step 5: Solve for x
    x = 4,759,248,421.37/78,125.88
  6. Step 6: Final answer
    x = 60,917.69

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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.