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Finding the Fourth Proportional to 77,858.96, 107,438.88 and 43,856.60

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Solution

The fourth proportional to 77,858.96, 107,438.88 and 43,856.60 is: 60,518.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,858.96 : 107,438.88 = 43,856.60 : x
  2. Step 2: Convert to fraction form
    77,858.96/107,438.88 = 43,856.60/x
  3. Step 3: Cross multiply
    77,858.96x = 107,438.88 × 43,856.60
  4. Step 4: Simplify right side
    77,858.96x = 4,711,903,984.61
  5. Step 5: Solve for x
    x = 4,711,903,984.61/77,858.96
  6. Step 6: Final answer
    x = 60,518.46

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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.