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Finding the Fourth Proportional to 77,886.84, 107,485.92 and 47,671.56

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Solution

The fourth proportional to 77,886.84, 107,485.92 and 47,671.56 is: 65,788.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,886.84 : 107,485.92 = 47,671.56 : x
  2. Step 2: Convert to fraction form
    77,886.84/107,485.92 = 47,671.56/x
  3. Step 3: Cross multiply
    77,886.84x = 107,485.92 × 47,671.56
  4. Step 4: Simplify right side
    77,886.84x = 5,124,021,484.44
  5. Step 5: Solve for x
    x = 5,124,021,484.44/77,886.84
  6. Step 6: Final answer
    x = 65,788.03

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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.