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Finding the Fourth Proportional to 78,124.64, 107,741.14 and 51,256.94

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Solution

The fourth proportional to 78,124.64, 107,741.14 and 51,256.94 is: 70,688.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,124.64 : 107,741.14 = 51,256.94 : x
  2. Step 2: Convert to fraction form
    78,124.64/107,741.14 = 51,256.94/x
  3. Step 3: Cross multiply
    78,124.64x = 107,741.14 × 51,256.94
  4. Step 4: Simplify right side
    78,124.64x = 5,522,480,481.66
  5. Step 5: Solve for x
    x = 5,522,480,481.66/78,124.64
  6. Step 6: Final answer
    x = 70,688.08

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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.